Слова на букву moru-oocy (732) Dictionary of invertebrate zoology
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Слова на букву moru-oocy (732)

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morular organ
see columella.
n. [L. dim. morus, mulberry] Formation of the morula during holoblastic egg cleavage.
see nucleolus.
n. [Gr. Mousaios, of the Muses] 1. An organism composed of two or more cell lines of different genetic or chromosomal constitution, both cell lines being derived from the same ...
mosaic evolution
Evolution that involves differential rates for different structures, organs, or other components of the phenotype.
mosaic theory
(ARTHROPODA) The theory explaining the function of the compound eye, with the numerous ommatidia receiving a portion of the image and then combining them into a total image in ...
adj. [L. moschus, musk] Having an odor similar to musk.
mother cell
A precursory cell or metrocyte.
mother genus
An original genus from which others have derived by nomenclatorial division.
adj. [L. movere, to move] Capable of spontaneous movement.
motor nerve
see motor neuron.
motor nervous system
A part of the nervous system lying entirely within the body that transmits stimuli from the central nervous system to the motor elements of the body.
motor neurocyte
The neurocyte of a motor neuron.
motor neuron
A neuron that transmits excitation directly to an effector; motor nerve.
adj. [F. mattele, curdled] Spotted with different colors; maculated; blotched.
see molt.
mound nest
(ARTHROPODA) Nest or part of one built above ground of soil or carton material.
mouse unit
(MOLLUSCA: Bivalvia) A unit of measurement employed as a gradient of shellfish poisoning.
n. [A.S. muth, mouth] The oral aperture.
mouth capsule
see buccal cavity.
mouth cirri
(ARTHROPODA: Crustacea) In Cirripedia, the first pair of modified cirri.
mouth cone
(ARTHROPODA: Insecta) The rostrum; proboscis, prostomium.
mouth fork
see lacinia.
mouth hooks
(ARTHROPODA: Insecta) In Cyclorrhapha 2nd instars, cuticular claw-like structures, one on each side of the atrial opening, thought to articulate with a small ventral ...
mouth spear
see stomatostyle, odontostyle.
mouth-anus axis
(MOLLUSCA: Bivalvia) In oysters, a line through the mouth and anus.
movable finger
(ARTHROPODA: Crustacea) The dactyl of the chela.
movable hook
(ARTHROPODA: Insecta) In Odonata, a small tooth on the inner border of the lateral lobe slightly external to the end-hook.
(ARTHROPODA: Crustacea) A group of neurosecretory cells in the medulla terminalis; the main source of eyestalk hormones.
adj. [L. mucidus, mucus-like] Mouldy; slimy.
adj. [L. mucus, mucus; facere, to make] Pertains to mucus- secreting.
n. [L. mucus, mucus; genos, to produce] A substance from which mucin is derived in mucin secreting cells.
adj. [L. mucus, mucus] Pertaining to gum-like or mucilage.
n. [L. mucus, mucus] A glycoprotein secreted by various cells or glands.
adj. [L. mucus, mucus; vorare, to devour] Feeding on the juices of plants. mucivore n.
adj. [L. mucus, mucus; Gr. eidos, like] Glycoproteins that are found in cartilage, cuticle, etc.
adj. [L. mucus, mucus; lysis, loosen] The breaking down or dissolving of mucus.
n. pl. [L. mucus, mucus; Gr. polys, many; sakcharon, sugar] Polysaccharides with aminosugar and uronic acid; a constituent of glycoproteins.
adj. [L. mucus, mucus; Gr. protos, first; eidos, form] A glucoprotein containing more than 4% hexosamine; see glucoprotein, glycoprotein.
adj. [L. mucor, mould] Pertaining to or appearing mouldy; surface covered with small fringe-like processes.
n. [L. mucus, mucus] Mucus membrane; lining of internal passageways.
adj. [L. mucus, mucus] Secreting mucus or a similar sticky substance by various cells, glands, or membranes.
mucous membrane
see mucosa.
n.; pl. mucrones [L. mucro, sharp point] A small pointed projection, or spine-like ending on a terminus.
see mucro.
n. [L. mucus, mucus] A slimy fluid secreted by gland cells present in many epithelia known as mucous membranes.
mulberry corpuscle
see spherule cell.
Muller's larva
(PLATYHELMINTHES: Turbellaria) In Polycladida, larva possessing eight posteriorly directed postoral lobes; see cephalotrocha larva.
Muller's organ
(ARTHROPODA: Insecta) A group of numerous scolopophores forming a swelling; in Acridoidea, applied to the inner surface of each tympanum and connected by the auditory nerve ...
Muller's thread
see ovarial ligament.
Mullerian association
A group of species showing Mullerian mimicry.
Mullerian mimicry
Similarity (usually consisting of coloration) of several species that are distasteful, poisonous, or otherwise harmful to a predator; see Batesian mimicry.
См. multiangulate.
adj. [L. multus, many; angulus, angle] Having many angles.
adj. [L. multus, many; articulus, joint] Manyjointed; polyarthric.
adj. [L. multus, many; camera, chamber] Having multiple chambers; see multilocular.
adj. [L. multus, many; carina, keel] Having many ridges or carinae.
adj. [L. multus, many; cella, cell] Comprised of two or more cells; many-celled.
n. [L. multus, many; colonia, colony] (ARTHROPODA: Insecta) Population of social insects divided into independent colonies or nests.
adj. [L. multus, many; facere, to do] Controlled by several gene loci.
adj. [L. multifarius, manifold] Arranged in several rows; see polystichous.
adj. [L. multus, many; findere, to cleave] Having many divisions or clefts.
adj. [L. multus, many; foris, gate] (ARTHROPODA: Insecta) A spiracle with three or more secondary openings in or near the peritreme.
adj. [L. multus, many; loculus, little place] Many celled or chambered; having many divisions or compartments; plurilocular; see multicamerate.
multilocular hydatid cyst
see alveolar hydatid cyst.
adj. [L. multus, many; nucleus, kernel] Pertaining to cells with many nuclei; a coenocyte; polykaric.
multiordinal crochets
(ARTHROPODA: Insecta) Crochets of larvae when they arise from a single row, but with many alternating lengths; see ordinal.
adj. [L. multus, many; dim. ovum, egg] With many ovules.
n. [L. multus, many; Gr. para, near; sitos, food] The coincident parasitism of an organism by two or more parasites of different species.
adj. [L. multus, many; parere, to beget] Bearing many offspring.
adj. [L. multus, many; partitis, divided] Divided into many parts.
multiple allele
A series of three or more alternative forms of a gene at a single locus in a chromosome.
adj. [L. multus, many; plicare, to fold] Having many folds or plicae.
multipolar cell
Cells with more than two nerves preceding from it.
multiporous septulum
(BRYOZOA: Gymnolaemata) A membrane or plate with many holes; a rosette-plate.
adj. [L. multus, many; ramus, branch] Many branched.
multiramous plasmatocyte
A plasmatocyte with three spindle ends.
multiramous vermiform cell
A vermiform cell with three spindle ends.
adj. [L. multus, many; series, a row] Having many series or rows.
multiserial bands
(ARTHROPODA: Insecta) In Lepidoptera, caterpillars with crochets absent from the mesial and lateral parts of the circle.
multiserial circle
(ARTHROPODA: Insecta) In Lepidoptera, caterpillar crochets arranged in three or more concentric circles.
multiserial crochets
(ARTHROPODA: Insecta) In Lepidoptera, crochets arranged in several rows.
adj. [L. multus, many; seta, bristle; ferre, to bear] With many setae.
adj. [L. multus, many; spina, spine] With many spines.
adj. [L. multus, many; spira, a coil] With numerous whorls.
adj. [L. multus, many; stria, furrow] With many striations; numerous thread-like lines, grooves or scratches.
adj. [L. multus, many; valens, strong] Pertaining to several chromosomes being attached together.
adj. [L. multus, many; valva, leaf of a folding door] (MOLLUSCA: Polyplacophora) Having more than two sections.
adj. [L. multus, many; vinculum, to bind] (MOLLUSCA: Bivalvia) Having a ligament with many bonds of union.
adj. [L. multus, many; It. volta, time] Having two or more generations or broods in a year or season; see bivoltine.
multizooidal bud
see giant bud.
n. [ML. mumia, mummy] (ARTHROPODA: Insecta) A pupa.
mumia pseudonympha
(ARTHROPODA: Insecta) A pupa with some degree of locomotion.
adj. [L. munitus, fortify] Provided with armature.
mural lacuna
see pustula.
mural plate
see compartmental plate.
mural spine
(BRYOZOA: Stenolaemata) A small skeletal spine extending into the zooidal chamber.
mural tooth
(NEMATA) A tooth attached to, or derived from the stomatal wall.
adj. [L. murex, a pointed stone] Formed with sharp elevated points; covered with sharp points.
muscidiform larva
(ARTHROPODA: Insecta) Like a Diptera larva; sub-cylindrical larva with the cephalic-end pointed and the caudal-end broad.
n. [L. musculus, muscle] Tissue made up of specialized cells for the production of motion by contraction; a sheet, bundle, or mass of such tissue.
muscle fibers
see fibroplasm.
muscle layer(s)
1. One or more layers of muscle below the epithelium. 2. (BRYOZOA: Phylactolaemata) Both longitudinal and circular muscles between epithelial and peritoneal layers of the ...
muscle scar
A mark on the interior of valve or carapace in Crustacea, Mollusca and Brachiopoda representing the position of muscle attachment, recognizable by surface texture, elevation, ...
muscle segment
A myomere.
muscular pad
(ECHIURA) A muscular tissue pad or pads associated with the ventral setae.
muscular sheath
(ARTHROPODA: Insecta) In Culicidae, a sheath enclosing a coelomic section of each of the ventral setae.
n. [L. musculus, muscle] (ARTHROPODA: Insecta) A muscular sheath surrounding the alimentary canal.
n. [L. musculus, muscle] The system or arrangement of muscular structure of an organism.
musculus bursae basalis
(NEMATODA: Secernentea) Bursal muscle that arises from the ventral side of the bursa and extends dorsally to the root of the dorsal ray.
musculus costae dorsalis
(NEMATODA: Secernentea) A many branched bursal muscle that arises mediodorsally in the dorsal ray, and extending anteriorly to become trifurcate, then the median arm ...
musculus costae lateralis externus anterior
(NEMATODA: Secernentea) Bursal muscles that arise anterior to the musculus costae lateralis externus posterior, extending posteriorly to the base of the ventral rays; ...
musculus costae lateralis externus posterior
(NEMATODA: Secernentea) A bursal muscle that arises anteriorly dorsad of the lateral cords, extending posteriorly and becoming trifurcate at the base of the lateral rays; ...
musculus costerum lateralium internis
(NEMATODA: Secernentea) Bursa muscle that arises as paired submedian muscles at the body wall anterior to the intestino-rectal valve; each laterally extended branch ...
mushroom bodies
(ARTHROPODA: Insecta) The two stalked nerve structures of the protocerebrum, that are connected with the optic lobes; see corpora pedunculata.
mushroom gland
(ARTHROPODA: Insecta) Large mushroom-shaped seminal vesicles.
n. [L. mutatus, change; facere, to make] Gene or genetic element that causes or increases the chance of mutation at another site.
n. [L. mutare, to change; Gr. gennaein, to produce] Any physical or chemical agent that increases mutational events.
n. [L. mutare, to change] An organism that undergoes mutation.
n. [L. mutare, to change] A structural change in a gene, consisting of a replacement, duplication, or deletion of one or several pairs in the DNA.
mutation frequency
The frequency of mutants in a population.
mutation rate
Frequency with which a mutation occurs per site per generation.
mutation theory
A theory of the origin of new characteristics in organisms as a result of changes in the genes; see saltation.
see De Vriesianism.
mutator genes
Any gene that causes an increase in mutation rates in other genes; see mutafacient.
n. [L. mutatus, change; Eng. protein] A mutationally altered protein analogous to the normal type.
См. mutilous.
v.t. [L. mutilus, cut-off] To deprive of one or more essential part(s); to amputate.
adj. [L. muticus; shortened] Unarmed; lacking defensive processes that usually occur.
n. [L. mutare, to change] The smallest element in the array of mutation sites, that when altered, may give rise to a mutant.
n. [L. mutuus, reciprocal] A type of symbiosis in which both host and symbiont benefit from the association.
n. [OF. musel, snout] Snout.
adj. [Gr. mys, muscle] 1. Referring to muscle, as in meromyarian. 2. (MOLLUSCA: Bivalvia) Used in classification as to number and position of the adductor muscles.
n. [Gr. mykes, fungus] In fungi, the network of filaments that form the vegetative part.
n. [Gr. mykes, fungus; angeion, vessel] (ARTHROPODA: Insecta) The fungus-storing organs of Platypodinae, a sac-like invagination of the epidermis at the posterior part of ...
n. [Gr. mykes, fungus; kytos, container] A large, polyploid cell containing intracellular mutualistic and commensalistic microsymbiotes; one of many cells that make up the ...
n. [Gr. mykes, fungus; -oma, mass] A specialized structure or organ that houses symbiotes.
n. [Gr. mykes, fungus; metochos, sharing] (ARTHROPODA: Insecta) Symbiosis between fungi and the dwellers of compound nests.
adj. [Gr. mykes, fungus; phagein, to eat] Feeding on fungi; mycophagous; fungivorous.
n. pl. [Gr. mykes, fungus; helmins, worm] Fungivorous nematodes.
adj. [Gr. mykes, fungus; phagein, to eat] Feeding on fungi; mycetophagous; fungivorous.
n. [Gr. mykes, fungus; -sis, process of] Any disease caused by the invasion of fungi.
n. [Gr. mykes, fungus; toxikon, poison] A low molecular weight metabolite of fungi which is poisonous to animals.
myelin sheath
A fatty material surrounding a nerve fiber.
n. [Gr. myia, fly; -iasis, morbid condition] A condition deriving from invasion by dipterous larvae.
n. [Gr. mys, muscle; blastos, bud] A cell that produces muscular fiber.
myochordotonal organ
(ARTHROPODA: Crustacea) In Decapoda, a proprioceptor at the proximal end of the meropodite, a flat membrane lying between the skeleton and sheath of the accessory ...
n. pl. [Gr. mys, muscle; kytos, container] (PORIFERA) Cells that cause contraction.
n. [Gr. mys, muscle; epi, upon; thele, nipple] 1. (BRYOZOA) A contractile ectodermal cell with intracellular striated muscles. 2. (CNIDARIA) Epithelium with a ...
См. myofibrils.
n.pl; sing. -a [Gr. mys, muscle; dim. fibra, fiber] Longitudinal fibrils of muscle cells.
adj. [Gr. mys, muscle; gennaein, to produce] Pertains to a muscle contraction initiated by nerve impulse; see neurogenic.
n. [Gr. mys, muscle; L. globus, ball] A type of hemoglobin occurring in muscle cells concerned with oxygen transport and storage; also called myohemoglobin.
n. [Gr. mys, muscle; haima, blood] An iron pigment said to occur in muscles; thought to be a cytochrome.
См. myohaematin.
adj. [Gr. mys, muscle; eidos, like] Composed of muscle fibers.
n. [Gr. mys, muscle; logos, discourse] That branch of anatomy dealing with the arrangement of muscles.
n. [Gr. mys, muscle; meros, part] A muscular segment.
myoneural junction
Point of junction between a motor nerve and the muscle which it activates.
n. [Gr. mys, muscle; neuron, nerve] A motor neuron.
n. [Gr. mys, muscle] The contracting power of muscle tissue.
n. [Gr. mys, muscle; pherein, to bear] (MOLLUSCA: Bivalvia) A spoon- or sickle-shaped structure beneath the beak on the interior of the shell; functioning as a place of ...
n. [Gr. mys, muscle; plasma, formed or molded] The contractile portion of a muscle cell.
n. [Gr. mys, muscle] Muscle protein that combines with actin to form actomyosin in muscle contraction.
n. [Gr. mys, muscle; ostrakon, shell] (MOLLUSCA: Bivalvia) That part of the shell wall secreted at the attachment of the adductor muscles.
n. [Gr. mys, muscle; tasis, tension] Muscular tonicity or tension.
n. [Gr. mys, muscle; tome, to cut] A muscle segment, somite or myomere.
n. [Gr. myrmex, ant; biosis, life] A symbiotic relationship between ants; consociation.
n. [Gr. myrmex, ant; chorein, to spread] Active dispersion of seeds by ants.
n. [Gr. myrmex, ant; kleptes, thief] (ARTHROPODA: Insecta) A form of symbiosis in which the guest ant steals food from the host ant.
n.; pl. -ia [Gr. myrmex, ant; domos, house] A plant tissue cavity inhabited by ants.
n. [Gr. myrmex, ant; L. colere, to inhabit] An organism that lives in ants\' nests, but does not otherwise interact with them; see myrmecophilous.
n. [Gr. myrmex, ant; logos, discourse] The division of entomology that studies ants.
adj. [Gr. myrmex, ant; phagein, to eat] Feeding on ants.
n. [Gr. myrmex, ant; philos, love] A symbiont of ants.
adj. [Gr. myrmex, ant; philos, love] Fondness of, or benefited by an association with ants; see myrmecole.
n. [Gr. myrmex, ant; philos, love] (ARTHROPODA: Insecta) The utilization by other insects, mainly beetles, of ant colonies as domiciles and sources of food; ant symbiosis; ...
adj. [Gr. myrmex, ant; phobeisthai, to flee] Having the ability to repel ants.
n. [Gr. myrmex, ant; phyton, plant] A myrmecophilous plant that has an obligatory, mutualistic relationship with ants.
n. pl. [Gr. myrmex, ant; xenos, guest] True guests of ants; see symphile.
mysis stage
(ARTHROPODA: Crustacea) In Decapoda, a larval stage in which only the thoracopods are used in swimming and the compound eye is stalked; schizopod larva; see zoea.
adj. [Gr. mystax, moustache] Bearded; having tactile hairs or vibrissae.
n. [Gr. mystax, moustache] (ARTHROPODA: Insecta) A cluster of hairs or bristles above the mouth; beard.
adj. [L. mytilus, sea mussel; forma, shape] 1. (ARTHROPODA: Insecta) In aquatic Hemiptera, the shell-shaped swimming feet. 2. (MOLLUSCA: Bivalvia) Having the form of a ...
n. [Gr. myzein, to suck] Suction or sucking.
n. [Gr. myzein, to suck; rhynchos, snout] (PLATYHELMINTHES: Cestoda) In some Tetraphyllidea, an apical stalked, sucker-like organ on the scolex.
n. [F. nacre, mother-of-pearl] (MOLLUSCA) The pearly or iridescent substance that lines the interior of shells, especially gastropods and pelecypods; mother-of-pearl; ...
n. [Gr. Naias, water nymph] (ARTHROPODA: Insecta) In Hemimetabola, the aquatic, gill-breathing nymph.
n. [A.S. naegel, nail] (ARTHROPODA) A tarsal claw; unguis.
adj. [A.S. nacod, nude] Lacking the usual covering.
n. [Gr. nanos, dwarf] Dwarfishness; nanoid adj..
nanitic worker
(ARTHROPODA: Insecta) In Formicidae, dwarf workers produced in first broods or later starved broods.
n. [Gr. nanos, dwarf; metron, a measure] Unit of measurement equal to one billionth of a meter; also called millimicron, micromillimeter and bicron.
n. [Gr. nanos, dwarf; plankton, wandering] Microscopic floating animal and plant organisms.
n. [Gr. nanos, dwarf; zoon, animal; eidos, like] (BRYOZOA: Stenolaemata) In Tubuliporidae, a polymorph with a single tentacle and reduced alimentary sac.
n. [Gr. narke, numbness, torpor] Stupor or unconsciousness caused by a drug or carbon dioxide build up in the blood.
n. [L. nasus, nose] (ARTHROPODA: Insecta) Anterio-median projection from the frons formed by fusion of frons, clypeus and labrum, or by frons and clypeus alone, ...
adj. [L. nascens, arising, beginning] Beginning to exist, grow, or develop; the act of being born.
n. [L. nasus, nose] (ARTHROPODA: Chelicerata) In Acari, an acronal protuberance at the anterior of the body overhanging the chelicerae.
Nassanoff's gland
see Nassanov\'s gland.
Nassanov's gland
(ARTHROPODA: Insecta) In Apis, a gland opening to the exterior beneath abdominal tergites six and seven, that function in pheromone production; well developed in workers, ...
n. [L. nasus, nose] (ARTHROPODA: Insecta) 1. The clypeal region; the drawn-out foreward part of the face. 2. In Isoptera, the snout-like frontal projection that functions ...
n. [L. nasus, nose] (ARTHROPODA: Insecta) A type of soldier termite that bears a frontal snout-like projection or horn through which it ejects a defensive toxin; some ...
adj. [L. natalis, of birth] Of or pertaining to birth.
natality rate
Birth rate; the number of births per population unit during a given period of time.
adj. [L. natare, to swim] Adapted for swimming; floating; swimming at the surface of the water.
adj. [L. natare, to swim] Characterized by swimming; adapted for swimming.
natatory lamellae
(ARTHROPODA: Insecta) In Orthoptera Gryllotalpidae, long slender plates of the hind tibiae.
n. pl. [L. natis, rump] The umbones of bivalves.
adj. [LL. naticae, buttocks] (MOLLUSCA: Gastropoda) Pertaining to Natica , a genus of carnivorous sea snail.
adj. [LL. naticae, buttocks; forma, shape] (MOLLUSCA: Gastropoda) Having globose last whorl and small spire, like the shell of Natica.
adj. [L. nativus, inherent, conferred by birth] Animals and plants originating and living in a particular area; not imported.
natural classification
In biology, a classification of groups of organisms or objects to show their characteristics and evolutionary relationships with each other; see artificial classification.
natural decrease
The rate of population decrease measured by subtracting the natality rate from the mortality rate; see natural increase.
natural group
A group of organisms having a common ancestor.
natural increase
The rate of population increase measured by subtracting mortality rate from natality rate.
natural requeening
see supersedure.
natural selection
The process of elimination of the least fitted individuals, and hence species, by the natural conditions of their habitat.
naupliar eye
see nauplius eye.
adj. [L. nauplis, shellfish; forma, shape] (ARTHROPODA: Crustacea) Pertaining to the nauplius larva.
nauplius eye
(ARTHROPODA: Crustacea) In nauplii and many adults, an unpaired median eye consisting of 1 to few light-sensitive cells; median eye; naupliar eye.
nauplius larva
(ARTHROPODA: Crustacea) The earliest larval stage(s), usually with one central eye, and characterized by having only three pairs of appendages: antennules, antennae, and ...
adj. [Gr. nautilos, nautilus shell; L. conus, cone] (MOLLUSCA: Cephalopoda) Spirally coiled in a single plane.
see nautiloid.
adj. [Gr. nautilos, nautilus shell; eidos, form] (MOLLUSCA: Cephalopoda) Any nautilid shell coiled in a symmetrical involute spiral; nautiliform.
adj. [L. dim. navis, ship] Boatshaped; cymbiform; scaphoid.
n. [L. ne, not; ala, wing] (ARTHROPODA: Insecta) 1. The jugum or jugal region of a wing. 2. Vannus.
n. [Gr. neos, new; allos, other; typos, type] An allotype of the opposite sex from that described in the publication of a neotype.
adj. [Gr. neanikos, fresh] 1. Being youthful or immature; a stage of development between the brephic and mature. 2. (ARTHROPODA: Insecta) The pupal stage. 3. ...
adj. [ME. neep, neap] A series of tides exhibiting a small tidal range; occurring midway between spring tides.
adj. [Gr. neos, new; arkticos, bear] Pertaining to or belonging to a terrestrial division comprised of Greenland and North America, and including northern Mexico.
neascus larva
(PLATYHELMINTHES: Trematoda) In Strigeidae and Diplostomatidae, a type of metacercaria with a cup-shaped forebody and a well developed hindbody.
adj. [L. nebula, cloud] Clouded; marked with many scattered dilated colors or spots; indistinct.
n. [A.S. hnecca, neck] 1. (ARTHROPODA: Insecta) The slender connecting structure between head and thorax where the head is free. 2. (MOLLUSCA) Distal part of the base of ...
neck organ
see nuchal organ.
n. [Gr. nekros, corpse; bios, life] A series of tissue changes occurring after the death of an individual cell.
n. [Gr. nekros, corpse; kytos, container] Death of a cell.
adj. [Gr. nekros, corpse; phagein, to eat] Feeding upon decaying flesh.
См. necrophoric behavior.
necrophoric behavior
(ARTHROPODA: Insecta) Carrying dead colony members away from the nest.
n. [Gr. nekros, corpse; izein, cause to be] The death of cells or tissues.
v.t. [Gr. nekros, corpse] To kill cells and tissues in a living organism.
n. [Gr. nektar, drink of the gods] A sweet substance secreted by flowers and certain leaves; the food of many insects.
adj. [Gr. nektes, swimmer; benthos, depths of the sea] Organisms swimming freely on or near the bottom of the sea.
see nectophore.
nectochaeta larva
(ANNELIDA: Polychaeta) A free swimming planktogenic larva of some aquatic forms that bear rings of cilia and 3 pairs of parapodia.
see nekton.
n. [Gr. nektos, swimming; phorein, to carry] (CNIDARIA: Hydrozoa) In Siphonophora, the muscular swimming bell that propels the colony; nectocalyx; nectozooid; see ...
n. [Gr. nektos, swimming; pous, foot] An appendage adapted for swimming.
n. [Gr. nektos, swimming; soma, body] (CNIDARIA: Hydrozoa) In Siphonophora, the part that bears the swimming bells.
see nectophore.
Needham's sac
См. Needham’s organ.
Needham’s organ
(MOLLUSCA: Cephalopoda) In males, a specialization of the sperm duct for formation and storage of spermatophores; spermatophoric sac.
negative geotropism
Movement directed away from the earth\'s gravitational force.
negative phototropism
The tendency to retreat from light.
negative tropism
The tendency to retreat from stimuli.
n. [Gr. nektes, swimmer] Organisms that swim in the open water, i.e., jellyfish, squid, fishes, turtles, seals and whales; necton; see seston.
n. [Gr. nema, thread] (NEMATA) Any individual of the phylum Nemata; a nematode.
nema curds
see nema wool.
nema wool
(NEMATA) Masses of cryptobiotic nematodes adhering to certain plant tissues (bulbs).
v.i. [Gr. nema, thread; L. ponere, to place] (ARTHROPODA: Insecta) Mock oviposition by insects parasitized by nematodes; the insect deposits nematodes instead of their own ...
См. nematodes.
n. [Gr. nema, thread; helmins, worm] A former name for the phylum that included the phyla Nemata, Nematomorpha and Acanthocephala collectively.

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