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Слова на букву macr-moru (732)

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mesaxon
n. [Gr. mesos, middle; axon, axel] (ARTHROPODA: Insecta) The spiral arrangement of a Schwann cell around an axon; suspensory fold.
mesenchyma
n. [Gr. mesos, middle; enchyma, infusion] Embryonic connective tissue derived primarily from mesoderm and consisting of a diffuse network of loosely connected or scattered ...
mesenchymatous cell
see hemocyte.
mesenchyme
См. mesenchyma.
mesenteron
n. [Gr. mesos, middle; enteron, gut] The midgut or midportion of the alimentary tract, endodermal in origin; ventriculus; midintestine.
mesenteron rudiments
(ARTHROPODA: Insecta) Groups of embryologic endodermal cells that regenerate the midgut (stomach) including the anterior and posterior; becomes the epithelium of the adult ...
mesentery
n. [Gr. mesos, middle; enteron, gut] A supporting membrane or one that forms a partition.
mesepimeral scale or seta
(ARTHROPODA: Insecta) Any scale or seta borne on the mesepimeron.
mesepimeral suture
see mesopleural suture.
mesepimeron
n.; pl. -mera [Gr. mesos, middle; epi, on; meros, part] (ARTHROPODA: Insecta) 1. The area of the mesopleuron posterior to the mesopleural suture; the epimeron of the ...
mesepisternum
n.; pl. -sterna [Gr. meros, middle; epi, on; sternum, chest] (ARTHROPODA: Insecta) 1. The area of the mesopleuron anterior to the mesopleural suture; sometimes divided ...
mesiad
adv. [Gr. mesos, middle; ad, toward] Toward the midline of the body.
mesial
adj. [Gr. mesos, middle] At or near the midline of the body.
mesial sclerite
see labellar mesial sclerite.
mesic
adj. [Gr. mesos, middle] Climate characterized by a moderate amount of water.
mesinfraepisternum
n. [Gr. mesos, middle; L. infra, below; Gr. epi, on; sternon, chest] (ARTHROPODA: Insecta) A ventral subdivision of the mesepisternum.
meskatepimeron
n. [Gr. mesos, middle; kata, inferior; epi, on; meros, part] (ARTHROPODA: Insecta) The lower division of the mesepimeron.
meskatepisternum
n. [Gr. mesos, middle; kata, inferior; epi, on; sternon, chest] (ARTHROPODA: Insecta) In Diptera, the lower area of the mesepisternum.
meso-epinotal suture
(ARTHROPODA: Insecta) In Formicidae, the transverse seam separating the mesonotum from the epinotum.
mesobasisternum
n. [Gr. mesos, middle; basis, bottom; sternon, chest] (ARTHROPODA: Insecta) 1. The basisternum of the mesothorax. 2. In Diptera, maybe separated from the mesofurcasternum ...
mesobiota
n. [Gr. mesos, middle; bios, life] Organisms in the soil ranging in size from nematodes to microannelids, microarthropods and mites; mesofauna.
mesoblast
n. [Gr. mesos, middle; blastos, bud] Embryonic mesoderm; the middle germ layer; mesoblastic adj..
mesoblastic somites
Segmental divisions of embryonic mesoderm.
mesobranchial lobe or area
(ARTHROPODA: Crustacea) In Decapoda, an intermediate part of the branchial region of the carapace.
mesocardiac ossicle
(ARTHROPODA: Crustacea) In Decapoda, a triangular or oblong plate, the apex pointing forward maybe more or less truncated; forming the keystone of the anterior arch of the ...
mesocephalic
adj. [Gr. mesos, middle; kephale, head] Having a medium size head.
mesocephalic pillars
(ARTHROPODA: Insecta) In bees, two oblique chitinous bars forming a brace between the anterior and posterior walls of the head.
mesocercaria
n. [Gr. mesos, middle; kerkos, tail] (PLATYHELMINTHES: Trematoda) A juvenile stage occurring in digenetic trematodes, an unencysted stage between the cercaria and the ...
mesocerebrum
n. [Gr. mesos, middle; L. cerebrum, brain] (ARTHROPODA: Crustacea) Ganglion of antennular somite; deuterocerebrum.
mesocoel
n. [Gr. mesos, middle; koilos, hollow] 1. The body cavity of the second division of the deuterostome body. 2. (BRYOZOA) Assumed to be the cavity within and at the base of ...
mesocole
adj. [Gr. mesos, middle; L. colere, to inhabit] Living conditions with neither too much nor too little water.
mesoconch
n. [Gr. mesos, middle; konche, shell] (MOLLUSCA: Bivalvia) An intermediate stage in formation of the dissoconch; separated from other stages by pronounced discontinuities.
mesocuticle
n. [Gr. mesos, middle; L. cutis, skin] A layer with distinctive staining properties between the exocuticle and endocuticle.
mesoderm
n. [Gr. mesos, middle; derma, skin] The cell layer between ectoderm and endoderm in the embryonic cells of all animals above the Cnidaria.
mesodermal tube
The dorsal blood vessel; heart.
mesodont
adj. [Gr. mesos, middle; odous, tooth] (ARTHROPODA: Insecta) Pertaining to male Lucanidae bearing mandibles intermediate in size; amphiodont; see teleodont, priodont.
mesoepisternum
see mesepisternum.
mesofauna
see mesobiota.
mesofurca
see furca.
mesogastric area
(ARTHROPODA: Crustacea) In Decapoda, the medial division of the gastric region of the carapace; usually five-sided in outline with a long narrow forward projection.
mesogastric lobe
См. mesogastric area.
mesogloea
n. [Gr. mesos, middle; gloios, glutinous] A thin to very thick, acellular to rather cellular, gelatinous connective tissue between the inner and the outer layers of a ...
mesohyl
n. [Gr. mesos, middle; hyle, matter] (PORIFERA) The space lying between the pinacoderm and the choanoderm.
mesolamella
n. [Gr. mesos, middle; L. dim. lamina, layer] A thin mesogloeal layer between epidermis and gastrodermis in Cnidaria and Porifera.
mesolecithal egg
Eggs with moderate yolk content; see centrolecithal egg.
mesology
see ecology.
mesomere
n. [Gr. mesos, middle; meros, part] 1. A blastomere of medium size. 2. A mesoblastic somite. 3. Central zone of coelomic pouches in an embryo. 4. (ARTHROPODA: Insecta) ...
mesomerites
n. pl. [Gr. mesos, middle; meros, part; -ites, having nature of] (ARTHROPODA: Diplopoda) Modified 9 pair of limbs; together with 8 pair (promerites) of limbs functioning as ...
mesomeron
n. [Gr. mesos, middle; meros, thigh] (ARTHROPODA: Insecta) In Diptera, the meron of the mesothorax behind the midcoxa below the mesepimeron; see metameron, meron.
meson
n. [Gr. mesos, middle] The central plane; the midline of the body; an imaginary plane dividing the body into right and left halves; the saggital plane.
mesonephridium
n. [Gr. mesos, middle; nephros, kidney] Nephridium of mesodermal origin.
mesonotum
n. [Gr. mesos, middle; notos, back] (ARTHROPODA: Insecta) The back or upper side of the mesothorax.
mesopelagic
adj. [Gr. mesos, middle; pelagos, sea] Pertaining to the pelagic zone of intermediate depth of 200-1000 m; between the epipelagic and bathypelagic zones.
mesopeltidium
see schizopeltid.
mesophragma
n. [Gr. mesos, middle; phragma, fence] (ARTHROPODA: Insecta) A chitinous piece that descends into the interior of an insect body with the postscutellum as the base.
mesoplankton
n. [Gr. mesos, middle; plankton, wandering] Floating life below euphotic zone; plankton organisms retained by a plankton net.
mesoplax
n. [Gr. mesos, middle; plax, plate] (MOLLUSCA: Bivalvia) A calcareous transverse plate straddling the two valves on their dorsal margins; see protoplax, metaplax.
mesopleural bristles
(ARTHROPODA: Insecta) In Diptera, a row of bristles on the posterior margin of the mesopleura.
mesopleural fovea
(ARTHROPODA: Insecta) In Hymenoptera Ichneumonidae, a pit or short horizontal groove on the mesopleurum, anterior to the mesopleural suture and below the speculum.
mesopleural ridge
(ARTHROPODA: Insecta) In Diptera, the pleural ridge marked externally by the mesopleural suture, between pleural apophyseal pit above the midcoxal articulation to the base ...
mesopleural sulcus
(ARTHROPODA: Insecta) In Diptera, passing downwards from the wing base to the middle coxa.
mesopleural suture
(ARTHROPODA: Insecta) The external groove of the mesopleural ridge, between the base of the wing to the midcoxal articulation.
mesopleuron
n.; pl. -ra [Gr. mesos, middle; pleuron, side] (ARTHROPODA: Insecta) 1. The pleuron of the mesothorax; in winged insects, composed of basalare, subalare, mesepisternum, ...
mesopleurosternal ridge
(ARTHROPODA: Insecta) In Diptera, a large, posteriorly curved invagination of the mesopleurosternal suture.
mesopleurosternal suture
(ARTHROPODA: Insecta) In Diptera, the external groove between the meskatepisternum and the mesobasisternum, or mesosternum when the mesobasisternum is not distinguishable; ...
mesopleurum
n. [Gr. mesos, middle; pleuron, side] (ARTHROPODA: Insecta) In Hymenoptera Ichneumonidae, the mesepisternum.
mesopostnotum
n. [Gr. mesos, middle; L. post, after; Gr. notos, back] (ARTHROPODA: Insecta) The postnotum of the mesothorax; see metapostnotum.
mesopostscutellum
n. [Gr. mesos, middle; L. post, after; scutellum, small shield] (ARTHROPODA: Insecta) The postscutellum of an insect\'s mesothorax.
mesopraescutum
n. [Gr. mesos, middle; L. prae, before; scutum, shield] (ARTHROPODA: Insecta) The praescutum of the mesothorax; see prescutum.
mesopsammic
adj. [Gr. mesos, middle; psammos, sand] Pertaining to organisms living interstitially in sand or a material in the form of rounded grains; psammous; mesopsammon n; see ...
mesopseudogyne
see pseudogyne.
mesorhabdions
n. pl. [Gr. mesos, middle; dim. rhabdos, rod] (NEMATA) The walls of the mesostome; see rhabdion.
mesoscutellum
n. [Gr. mesos, middle; L. scutellum, little shield] (ARTHROPODA: Insecta) The scutellum of the mesothorax, usually referred to as scutellum.
mesoscutum
n. [Gr. mesos, middle; L. scutum, shield] (ARTHROPODA: Insecta) The scutum of the mesothorax.
mesoseries
n. [Gr. mesos, middle; L. series, row] (ARTHROPODA: Insecta) In larva, a band of crochets or hooks extending longitudinally on the mesal side of a proleg; when curved, ...
mesosoma
n. [Gr. mesos, middle; soma, body] 1. The middle part of an invertebrate\'s body. 2. (ARTHROPODA: Chelicerata) In Arachnida, the anterior portion of the abdomen, often ...
mesosome
n. [Gr. mesos, middle; soma, body] (ARTHROPODA: Crustacea) A collective term for all free thoracic somites behind the head.
mesospermalege
n. [Gr. mesos, middle; sperma, seed; L. legere, to gather] (ARTHROPODA: Insecta) A special pouch in certain females for reception of sperm; Ribaga\'s or Berlese\'s organ.
mesosternal cavity
(ARTHROPODA: Insecta) In Elateridae, the opening into which the prosternal process catches.
mesosternellum
n. [Gr. mesos, middle; L. dim. sternum, breast bone] (ARTHROPODA: Insecta) A small rod-like plate that articulates posteriorly with the mesosternum.
mesosternum
n. [Gr. mesos, middle; sternon, breast] 1. (ARTHROPODA: Crustacea) In some Decapoda Brachyura, the median plate of the sternum. 2. (ARTHROPODA: Insecta) In Hymenoptera, ...
mesostom
n. [Gr. mesos, middle; stoma, mouth] (NEMATA) A division of the protostome preceded anteriorly by the prostome and posteriorly by the metastome; see prostome.
mesostome
См. mesostom.
mesostracum
n. [Gr. mesos, middle; ostrakon, shell] (MOLLUSCA: Polyplacorphora) A calcareous shell layer between the tegmentum and the articulamentum in certain more highly developed ...
mesotarsal ring
see basitarsal ring.
mesotarsus
n. [Gr. mesos, middle; tarsos, sole of foot] (ARTHROPODA: Insecta) The tarsus of the middle leg.
mesotergum
see mesonotum.
mesothoracotheca
n. [Gr. mesos, middle; thorax, chest; theke, case) (ARTHROPODA: Insecta) In pupal forms, the covering of the mesothorax.
mesothorax
n. [Gr. mesos, middle; thorax, chest] (ARTHROPODA: Insecta) The middle of the thoracic divisions.
mesothyridid
n. [Gr. mesos, middle; thyridos, a window] (BRACHIOPODA) Pedicle opening partly in the ventral umbo and partly in the delthyrium, with beak ridges appearing to bisect the ...
mesotriaene
n. [Gr. mesos, middle; triaina, trident] (PORIFERA) A megasclere triaene with a rhabd projecting on both sides of a cladome.
mesotroch
n. [Gr. mesos, middle; trochos, wheel] (ANNELIDA: Polychaeta) A ciliated band around the midbody of a marine annelid.
Mesozoa
См. mesozoans.
mesozoans
n.; n. pl. [Gr. mesos, middle; zoon, animal] Ciliated, multicellular organisms, endoparasitic in a variety of marine invertebrates; two layered, having no skeletal, ...
mesozona
n. [Gr. mesos, middle; zone, belt] (ARTHROPODA: Insecta) The middle portion of the pronotum; see prozona.
metabiosis
n. [Gr. meta, between; bios, life] A condition of life where an organism precedes and prepares the environment for another organism, inducing an exchange of growth factors ...
metablastic
see ectoderm.
metabola
n. [Gr. metabole, change] (ARTHROPODA: Insecta) Species having distinct external changes during the stages of their life history; see paurometabola, hemimetabola, ...
metabolic activities
Any forms of activity that have to do with metabolism.
metabolic water
Water produced in the cells as a by-product of metabolism.
metabolism
n. [Gr. metabole, change; ismos, denoting condition] The sum total of chemical reactions occurring in living matter; metabolic a; see catabolism, anabolism.
metabolite
n. [Gr. metabole, change; ites, like] Any by-product of a living organism; a metabolized substance.
metabranchial lobe or area
(ARTHROPODA: Crustacean) In Decapoda, the posterior branchial region of the carapace.
metacentric
adj. [Gr. meta, after; kentron, center of circle] Having the centromere situated along the chromosome, except at or near the tip, e.g., J- or V-shaped in metaphase; see ...
metacephalon
n. [Gr. meta, after; kephale, head] (ARTHROPODA: Insecta) In Diptera, the area behind the mouth extending up toward the neck.
metacercaria
n. [Gr. meta, after; keros, tail] (PLATYHELMINTHES: Trematoda) The stage succeeding the cercarial, following loss of tail; it may invade the definitive host (blood flukes) ...
metacerebrum
n. [Gr. meta, after; L. cerebrum, brain] (ARTHROPODA: Crustacea) Ganglion of antennal somite; tritocerebrum.
metacestode
n. [Gr. meta, after; kestos, girdle; eidos, form] (PLATYHELMINTHES: Cestoda) The developmental stage of the plerocestoid where proglottids are evident but generative ...
metachemogenesis
n. [Gr. meta, change of; chemeia, infusion; genesis, beginning] (ARTHROPODA: Insecta) In holometabolous forms, post-emergence biochemical maturation; does not include sexual ...
metachromasia
См. metachromasy.
metachromasis
См. metachromasy.
metachromasy
n. [Gr. meta, change of; chroma, color] Staining of tissue components in different colors by a single dye.
metacnemes
n. pl. [Gr. meta, after; kneme, leg] (CNIDARIA: Anthozoa) Secondary mesentaries between the primary cycle.
metacoel
n. [Gr. meta, after; koilos, hollow] 1. The body cavity of the third division of the deuterostome body. 2. (BRYOZOA) Believed to be the main body cavity.
metacorporal valve
(NEMATA) An expanded, strongly cuticularized portion of the triradiate lumen at the center of the metacorpus that functions as a pump during feeding.
metacorpus
n. [Gr. meta, after; L. corpus, body] (NEMATA) The median esophageal bulb; the middle bulb; the median bulb.
metacoxal plate
(ARTHROPODA: Insecta) In Coccinellidae, a portion of the first ventral segment included above the ventral lines, visible on the metathorax.
metacyclic
adj. [Gr. meta, after; kyklos, circle] Pertaining to a stage in the life cycle of a parasite that is infective to its definitive host.
metacyst
n. [Gr. meta, after; kystis, bladder] A cystic stage of a parasite in a host.
metaepisternum
see metepisternum.
metaerucism
n. [Gr. meta, after; L. eruca, caterpillar] (ARTHROPODA: Insecta) Poisoning by larval setae on cocoons, etc; see lepidopterism.
metafemale
n. [Gr. meta, after; L. femella, little woman] (ARTHROPODA: Insecta) In Diptera, an individual with 3 X-chromosomes and 2 sets of autosomes; found in Drosophila.
metagastric lobe or area
(ARTHROPODA: Crustacea) In Decapoda, the posterior division of the gastric region of the carapace; sometimes ill-defined.
metagenesis
n. [Gr. meta, after; genesis, beginning] Alternation of sexual and asexual reproduction in the life cycle of certain animals; alternation of generations; see ...
metagnath
n. [Gr. meta, change of; gnathos, jaw] (ARTHROPODA: Insecta) Those insects with biting mandibles when young and sucking mouth parts as adults; see menognath, Menorhyncha.
metagonia
n. [Gr. meta, after; gonia, angle] (ARTHROPODA: Insecta) The anal angle of a wing.
metagynous
adj. [Gr. meta, after; gyne, female] (ANNELIDA: Oligochaeta) Having the ovaries only in segment xiii or a homoeotic segment.
metagyny
see protandry.
metakinesis
n. [Gr. meta, after; kinesis, movement] Separation of chromatids during anaphase.
metamale
n. [Gr. meta, change of; L. mas, male] (ARTHROPODA: Insecta) A male Drosophila with three (3) sets of autosomes and one X-chromosome.
metamere
n. [Gr. meta, after; meros, part] One or more of a series of homologous parts of many animals; a merosome; a somite; metameric adj..
metameric
sac see osmeterium.
metamerism
n. [Gr. meta, after; meros, part] Segmental repetition of homologous body parts; metameres; metasomes.
metameron
n. [Gr. meta, after; meros, upper thigh] (ARTHROPODA: Insecta) In Diptera, the meron of the metathorax; a vertical sclerite above the hindcoxa; see mesomeron, meron.
metameros
n. [Gr. meta, after; meros, part] (ARTHROPODA: Insecta) In Lepidoptera, the combined sixth to eighth abdominal segments.
metamorphosis
n.; pl. -ses [Gr. meta, change of; morphe, form] A marked change in form or structure an animal undergoes from one growth stage to another; also applies to the actual process ...
metanauplius
n. [Gr. meta, after; nauplios, shellfish] (ARTHROPODA: Crustacea) One to several larval stages subsequent to the first (nauplius) larva; characterized by increasing size and ...
metandry
n. [Gr. meta, after; aner, male] (ANNELIDA) Possessing only the posterior pair of testes; in earthworms, testes restricted to segment xi; metandric a; see proandry, ...
metaneme
n. [Gr. meta, after; nema, thread] (NEMATA) Filamentous organs in or near the lateral epidermal cords that usually have anterior and sometimes posterior filaments and a ...
metanephridium
n.; pl. -ia [Gr. meta, after; nephros, kidney] Paired osmoregulatory or excretory tubules in some phyla; tubules that open into the body cavity and are found in coelomate ...
metanephromixium
n. [Gr. meta, after; nephros, kidney; mixis, mingling] (ANNELIDA: Polychaeta) Nephromixium in which the coelomostome and nephrostome are combined into a genital and/or ...
metanotal
gland (ARTHROPODA: Insecta) In male Oecanthus (Orthoptera) and some blattids, special glands on the dorsum of the thorax that produces a secretion attractive to females.
metanotal slopes
(ARTHROPODA: Insecta) In Diptera, the pleurotergites.
metanotum
n.; pl. -nota [Gr. meta, after; notos, back] (ARTHROPODA: Insecta) The dorsal sclerite of the metathorax; metanotal adj..
metaparapteron
n. [Gr. meta, after; para, beside; pteron, wing] (ARTHROPODA: Insecta) In Formicidae, the postscutellum.
metapeltidium
see schizopeltid.
metaphase
n. [Gr. meta, after; phasis, to appear] The stage of mitosis when the chromosomes line up in the equatorial plane of the spindle.
metaplasis
n. [Gr. meta, after; plasis, molding] The mature period in an individuals life.
metaplasm
n. [Gr. meta, after; plasma, formed or molded] Non-living protoplasmic inclusions; metaplastic adj..
metaplax
n. [Gr. meta, after; plax, plate] (MOLLUSCA: Bivalvia) A long narrow posteriorly pointed, rounded or forked accessory plate covering the gape between the two valves on the ...
metapleural bristles
(ARTHROPODA: Insecta) In Diptera, a bristle or bristles on the metapleura.
metapleural gland
(ARTHROPODA: Insecta) In most Formicidae, a gland with an external bulla and a small orifice, opening on each side of the metathorax at its lower posterior corners; ...
metapleuron
n.; pl. -ura [Gr. meta, after; pleuron, side] (ARTHROPODA: Insecta) 1. The lateral sclerites of the metathorax. 2. In Diptera, the pleuron of the metathorax; metapleural ...
metapleurum
n. [Gr. meta, after; pleuron, side] (ARTHROPODA: Insecta) In Hymenoptera Ichneumonidae, ordinarily divided into two parts, the lower is largest and generally referred to; ...
metapneustic
adj. [Gr. meta, after; pneustikos, of breathing] (ARTHROPODA: Insecta) Said of aquatic insect larvae having only the posterior pair of spiracles open and functioning; see ...
metapodeon
n. [Gr. meta, after; podeon, neck] (ARTHROPODA: Insecta) That part of an abdomen behind the podeon or petiole.
metapodium
n. [Gr. meta, after; pous, foot] (MOLLUSCA) The posterior portion of the foot.
metapodosoma
n. [Gr. meta, after; pous, foot; soma, body] (ARTHROPODA: Chelicerata) In ticks or mites, that portion of the podosoma that bears the third and fourth pair of legs.
metapolar cells
(MESOZOA) The posterior tier of cells in the calotte.
metapon
n. [Gr. metopon, forehead] (ARTHROPODA: Crustacea) In Decapoda, the entire preoral area, including part of the mandibular somite.
metapostnotum
n. [Gr. meta, after; L. post, after; Gr. notos, back] (ARTHROPODA: Insecta) The postnotum of the metathorax; see mesopostnotum.
metapostscutellum
see postscutellum.
metapraescutum
См. metaprescutum.
metaprescutum
n. [Gr. meta, after; L. prae, before; scutum, shield] The prescutum of the metathorax.
metapygidium
n. [Gr. meta, after; pyge, rump] (ARTHROPODA: Insecta) 1. In Dermaptera, the posterior ventral segment of the supra-anal plate. 2. In Coleoptera, the penultimate tergite ...
metarhabdions
n. pl. [Gr. meta, after; rhabdos, rod] (NEMATA) The cuticularized walls of the metastome; see rhabdion.
metascolex
n. [Gr. meta, after; scolex, worm] (PLATYHELMINTHES: Cestoda) The posterior portion of a transversely divided scolex.
metascutellum
n. [Gr. meta, after; L. scutellum, dim. scutum, shield] (ARTHROPODA: Insecta) The scutellum of the metathorax.
metasoma
n. [Gr. meta, after; soma, body] 1. The posterior region of many invertebrates. 2. (ACANTHOCEPHALA) The posterior part of the body or trunk. 3. (ARTHROPODA) The abdomen ...
metasome
n. [Gr. meta, after; soma, body] (ARTHROPODA: Crustacea) In Copepoda, a portion of the prosome, consisting of free thoracic somites anterior to the major point of body ...
metastasis
n.; pl. -ses [Gr. meta, after; stasis, standing] The transfer of pathogenic microorganisms to parts of the body remote from the origin of infection.
metasternal glands
(ARTHROPODA: Insecta) In Formicidae, paired organs in the posterior area of the thorax, opening to the outside near the pleural-sternal margins of the metathorax.
metasternal orifice
(ARTHROPODA: Insecta) In Formicidae, the opening of the metasternal gland.
metasternum
n. [Gr. meta, after; sternon, chest] (ARTHROPODA: Insecta) 1. The sternum or ventral sclerite of the metathorax. 2. For Diptera, see mesepimeron.
metastigmata
n. pl. [Gr. meta, after; stigma, point] (ARTHROPODA: Insecta) The posterior spiracles of the synthorax.
metastom
n. [Gr. meta, after; stoma, mouth] (NEMATA) The posterior subdivision of a prostome.
metastoma
n.; pl. -mata [Gr. meta, after; stoma, mouth] 1. (ARTHROPODA: Crustacea) The lower lip posterior to the mandibles, usually cleft into paragnaths; hypostoma; hypostome; ...
metastome
См. metastom.
metasyndesis
see acrosyndesis.
metatarsus
n.; pl. -si [Gr. meta, after; tarsos, flat of the foot] (ARTHROPODA) The basal segment of a tarsus; next to the tibia; the basitarsis.
metatentorium
n.; pl. -ia [Gr. meta, after; L. tentorium, tent] (ARTHROPODA: Insecta) A posterior arm of the tentorium.
metatergum
see metanotum.
metathetely
n. [Gr. meta, after; theein, to run; telos, end] (ARTHROPODA) 1. A neotenous adult arthropod after undergoing normal or more than normal numbers of molts. 2. In Insecta, ...
metathoracotheca
n. [Gr. meta, after; thorax, chest; theke, case] (ARTHROPODA: Insecta) The pupal covering of the metathorax.
metathorax
n. [Gr. meta, after; thorax, chest] (ARTHROPODA: Insecta) The third or posterior segment of the thorax, bearing the hind legs and the hind wings.
metatroch
n. [Gr. meta, after; trochos, wheel] (ANNELIDA) In Polychaeta, trochophore larvae, as well as some other groups, the postoral girdle of cilia; see prototroch, telotroch. ...
metatrochophore
n. [Gr. meta, after; trochos, wheel; phorein, to bear] (ANNELIDA: Polychaeta) A ciliated trochophore larva developing trunk segments.
metaxyphus
n. [Gr. meta, after; xiphos, sword] (ARTHROPODA: Insecta) In Hemiptera, spinose or triangular process of the metasternum.
Metazoa
См. metazoans.
metazoans
n.; n. pl. [Gr. meta, after; zoon, animal] 1. A small phylum of endoparasitic, ciliated, multicellular organisms composed of two layers, lacking skeletal, muscular, nervous, ...
metazoea
n. [Gr. meta, after; zoe, life] (ARTHROPODA: Crustacea) A late zoeal stage in Anomura and Brachyura with simple uniramous limbs on posterior thoracomeres, budding pleopods ...
metazona
n. [Gr. meta, after; zone, belt] (ARTHROPODA: Insecta) The posterior part of the pronotum; see prozona.
metazonite
n. [Gr. meta, after; zone, belt] (ARTHROPODA: Diplopoda) The posterior portion of a diplosomite, divided by a transverse groove; see prozonite.
metecdysis
n. [Gr. meta, after; ekdysis, molt] (ARTHROPODA) The period following a molt before the new cuticle hardens, especially in Decapoda (Crustacea).
metelattosis
n. [Gr. meta, after; elatton, smaller] (ARTHROPODA: Chelicerata) Regression of postembryonic development, initiated after the beginning stasis.
metenchium
n. [L. meta, conical column; Gr. enchos, spear] (NEMATODA: Secernentea) Conus of the stylet in plant parasites in the order Tylenchida; see telenchium.
metenteron
n. [Gr. meta, after; enteron, intestine] (CNIDARIA) The radial digestive chamber; see mesenteron.
metepimeron
n.; pl. -mera [Gr. meta, after; epi, on; meros, part] (ARTHROPODA: Insecta) The epimeron of the metathorax.
metepisternum
n.; pl. -sterna [Gr. meta, after; epi, on; sternon, breast] (ARTHROPODA: Insecta) 1. The episternum of the metathorax. 2. In Culicidae, behind and below the metathoracic ...
meter
n. [Gr. metron, a measure] A measure of length in the metric system; 39.37 inches; see centimeter, millimeter.
metinfraepisternum
n. [Gr. meta, after; L. infra, underneath; Gr. epi, on; sternon, breast] (ARTHROPODA: Insecta) In Odonata, a ventral subdivision of the metepisternum.
metochy
see symphily, synechthry.
metoecious parasite
A parasite that is not host-specific; see heteroecious.
metope
n. [Gr. metopon, forehead] The middle frontal portion of a head; see metapon.
metopic suture
see coronal suture or branch.
metopidium
n. [Gr. metopidios, of the forehead] (ARTHROPODA: Insecta) In Membracidae, the anterior downward sloping surface of the prothorax.
metraterm
n. [Gr. metra, womb; terma, end] (PLATYHELMINTHES: Trematoda) In Digenea, the muscular, terminal portion of the uterus.
metric system
A decimal system of measures and weights.
metrocyte
n. [Gr. metros, mother; kytos, container] A cell having given rise to other cells by division; mother cell; precursory cell.
micelle
n.; pl. -ae [L. micarius, crumbs] A supermolecular colloid particle, often an orderly packet of chain molecules in parallel arrangement.
micraesthetes
n. pl. [Gr. mikros, small; aisthetes, one who perceives] (MOLLUSCA: Polyplacophora) One or more small sensory organs, in the form of eyes, sometimes accompanying the ...
micraner
n. [Gr. mikros, small; aner, male] (ARTHROPODA: Insecta) In Formicidae, a dwarf male; see microgyne.
micrergate
n. [Gr. mikros, small; ergate, worker] (ARTHROPODA: Insecta) In Formicidae, a dwarf worker, a microergate.
microbe
n. [Gr. mikros, small; bios, life] A microscopic organism.
microbiota
n. [Gr. mikros, small; bios, life] 1. The combined or singularly considered microflora and microfauna of an organism. 2. Microscopic soil organisms.
microbivorous
adj. [Gr. mikros, small; bios, life; L. vorare, to devour] Microbe eating; microbiotrophic.
microbody
n. [Gr. mikros, small; Eng. body] Spherical or ovoid bodies that are rich in enzymes of peroxide metabolism.
microbotroph
n. [Gr. mikros, small; bios, life; trophein, to feed] Microscopic faunal forms that obtain nourishment from digesting living microorganisms; microbivorous.
microcalthrop
См. microcaltrop.
microcaltrop
n. [Gr. mikros, small; ML. calcitrapa, a four-pointed weapon] (PORIFERA) A microsclere tetraxon spicule with four rays, one elongated and three short; a euaster with 4 ...
microcentrum
see centrosome.
microcephalic
adj. [Gr. mikros, small; kephale, head] Having an abnormally small head; see megacephalic, mesocephalic.
microcercous cercaria
(PLATYHELMINTHES: Trematoda) Small cercaria with a very short tail and a stylet in the oral sucker; see xiphidiocercaria.
microchaetae
n. pl. [Gr. mikros, small; chaeta, mane] Small bristles; see chaeta, macrochaetae.
microclimate
n. [Gr. mikros, small; klima, slope] The climate of the habitat in which the individual lives.
microcnemes
n. pl. [Gr. mikros, small; knemis, leg] (CNIDARIA: Anthozoa) In Actinaria, younger, narrow mesentaries lacking filaments; see macrocnemes.
microcotylate
cercaria (PLATYHELMINTHES: Trematoda) A group of small xiphidiocercariae with a postequatorial ventral sucker, and finless tail equal to the body length.
microdrile
n. [Gr. mikros, small; drilos, worm] (ANNELIDA: Oligochaeta) A general term for the aquatic forms; see megadrile.
microelectrode
n. [Gr. mikros, small; elektron, amber] Small electrode for sensing electrical activity in a neuron.
microergate
see micrergate.
microevolution
n. [Gr. mikros, small; L. evolutus, unrolling] All processes of species formation and differentiation brought about by the combined action of various evolutionary factors; see ...
microfauna
n. [Gr. mikros, small; L. Faunus, diety of herds and fields] Very small animals; animals less than 200 m.
microfibril
n. [Gr. mikros, small; L. dim. fibra, fiber] Microscopic or submicroscopic fiber.
microfilaria
n. [Gr. mikros, small; L. filum, thread] (NEMATA) The uncoiled mobile embryo of a filaria, that either escapes from the egg shell (unsheathed) or causes stretching of the ...
microgamete
n. [Gr. micros, small; gametes, husband] 1. A slender, active, male anisogamete. 2. Derived from the microgametocyte of the malarial protozoan; see macrogamete.
microgametocyte
n. [Gr. mikros, small; gamete, husband; kytos, container] The male gametocyte that gives rise to microgametes.
microgeographic race
A local race, restricted to a small area.
microgram
n. [Gr. mikros, small; gramma, small weight] One thousandth of a gram.
microgranular cells
(PORIFERA) Cells with cytoplasm charged with small dense granules.
microgyne
n. [Gr. mikros, small; gyne, woman] (ARTHROPODA: Insecta) In Formicidae, a dwarf female; see micraner.
microhabitat
n. [Gr. mikros; small; L. habitare, to dwell] A small or restricted habitat; see niche.
microhexactine
n. [Gr. mikros, small; hex, six; aktis, ray] (PORIFERA) A small hexactine spicule.
microic
adj. [Gr. mikros, small; eidos, like] (ANNELIDA: Oligochaeta) Smaller than macroic, a substitute for micronephridial, often applied to nephridia as large as or larger than ...
microlecithal
adj. [Gr. mikros, small; lekithos, egg yolk] Containing little yolk.
microleucocyte
n. [Gr. mikros, small; leukos, white; kytos, container] A small amoebocyte.
micromere
n. [Gr. mikros, small; meros, part] Small cells of the animal pole in eggs with abundant yolk.
micromesentary
n. [Gr. mikros, small; mesos, middle; enteron, gut] (CNIDARIA: Anthozoa) In Zoantharia, an incomplete secondary mesentary.
micrometer
n. [Gr. mikros, small; metron, a measure] A unit of microscopic measure, designated by the Greek letters m; one-thousandth of a millimeter.
micromillimeter
see nanometer.
micromutation
see point mutation.
micron
see micrometer.
micronekton
n. [Gr. mikron, small; nektos, swimming] Small, swimming organisms in the ocean.
micronephridia
see microic, nephridium.
micronicus
see epicaridum.
microniscus
См. micronicus.
micronucleocytes
see plasmatocytes.
microorganism
n. [Gr. mikros, small; organon, instrument] A microscopic organism such as most nematodes, rotifers, etc.
micropaleontology
n. [Gr. mikros, small; palaios, ancient; logos, discourse] The study of microscopic fossils.
microphagous
adj. [Gr. mikros, small; phagein, to eat] Feeding on small objects; see macrophagous.
microphthalmy
n. [Gr. mikros, small; ophthalmos, eye] An abnormally small antenna; microphthalmic adj..
microplankton
n. [Gr. mikros, small; plankton, wandering] Small organisms floating in water.
microplasmatocyte
n. [Gr. mikros, small; plasmatos, image; kytos, container] (ARTHROPODA: Insecta) A small plasmatocyte having a small amount of vacuolar cytoplasm; see eoplasmatocyte.
micropore
n. [Gr. mikros, small; poros, pore] (MOLLUSCA: Polyplacophora) A small pore in the dorsal plates; associated with an aesthete.
micropredator
n. [Gr. mikros, small; L. praedator, plunderer] A temporary parasite.

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