Слова на букву amph-auxo (732) Dictionary of invertebrate zoology
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Слова на букву amph-auxo (732)

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antipodal
adj. [Gr. anti, against; pous, foot] Diametrically opposite; located on the opposite side.
antipygidial bristles
(ARTHROPODA: Insecta) In Siphonaptera, bristles located on the seventh abdominal segment.
antirostrum
n. [Gr. anti, against; L. rostrum, beak] (ARTHROPODA: Chelicerata) Terminal segmental appendages of some mites.
antispadix
n. [Gr. anti, against; L. spadix, palm branch] (MOLLUSCA: Gastropoda) Four modified tentacles opposite the spadix of the male Nautilus, sp.
antisquama
n.; pl. -mae [Gr. anti, against; L. squama, scale] (ARTHROPODA: Insecta) In Diptera, the upper lobe (alula) that moves with the wing; antitegula; see squama.
antistyle
n. [Gr. anti, against; stylos, pillar] (ARTHROPODA: Insecta) The basal segment of the stylifer.
antitegula
see antisquama.
antithetic generation
Alternation of generations in which the alternates are very different in appearance and origin.
antitoxin
n. [Gr. anti, against; toxikon, poison] Any substance that neutralizes a toxin.
antitype
n. [Gr. anti, against; typos, type] 1. An opposite type; a countertype. 2. A corresponding specimen of a type species, obtained at the same time and location of the type. ...
antizoea
n. [L. anti, against; zoe, life] (ARTHROPODA: Crustacea) The first larval stage of the large, carnivorous marine mantis shrimps of the superorder Hoplocarida, that lack the ...
antlered larvae
(ARTHROPODA: Insecta) In some newly hatched Lepidoptera larvae, antler-like horns on the first thoracic segment and other horns (scoli) on the abdominal segments.
antlia
n. [Gr. antlia, pump] (ARTHROPODA: Insecta) The spiral, tubular proboscis.
antrorse
adj. [L. antero, anterior; versus, turned] Directed or leaning upward or forward; see detrorse, retrorse.
antrum
n. [L. antrum, hollow] 1. A hollow space or cavity. 2. A sinus.
anucleate
adj. [Gr. an, without; L. nucleus, kernel] Lacking a nucleus.
anural
adj. [Gr. an, without; oura, tail] Lacking a tail.
anuria
n. [Gr. an, without; ouron, urine] Absence of or inability to excrete urine.
anus
n. [L. anus] The terminal orifice of the alimentary canal, through which unabsorbed food and waste products are voided; in some groups it is associated with the cloaca; ...
aorta
n. [Gr. aorte, the great artery] The main vessel carrying blood from the heart; the dorsal blood vessel.
aortal chamber
The thoracic expansion of the aorta.
aortic valve
The closure mechanism of the dorsal vessel, separating the aorta and the heart proper.
apatetic color
Those colors that enable an organism to mimic either its environment or another species.
apertum
n. [L. aperire, to open] (ARTHROPODA: Insecta) In Coleoptera, a basal cell opening on the hind wing.
apertural
adj. [L. aperire, to open] Pertaining to or on the same side as the aperture.
apertural muscle
(BRYOZOA: Gymnolaemata) One of either two pairs of muscles of cheilostomate autozooids, the occlusor muscle of the operculum or the diaphragmatic dilator muscle.
aperture
n. [L. aperire, to open] 1. An opening or hole, cleft, or gap. 2. (ARTHROPODA: Crustacea) The postero-ventral opening into the mantle cavity of barnacles; see orifice. ...
apex
n.; pl. apexes, apices [L. apex, tip] 1. That portion of any structure opposite the base of attachment; the tip. 2. (ARTHROPODA: Crustacea) The upper angle of the scutum or ...
aphagia
n. [Gr. a, not; phagein, to eat] Unable to ingest.
apharyngeate cercariae
(PLATYHELMINTHES: Trematoda) Larvae that develop in daughter sporocysts in pulmonate or prosobranch snails.
Aphasmidia
see Adenophorea.
aphideine
see aphidilutein.
aphidicolous
adj. [NL. aphis, plant-louse; L. colere, to dwell] (ARTHROPODA) Pertaining to associating with aphid colonies, as certain ants.
aphidilutein
n. [NL. aphis, plant-louse; L. luteus, yellow] The yellowish liquid found in plant lice; see aphins.
aphidivorous
adj. [NL. aphis, plant-louse; L. vorare, to devour] Feeding on aphids.
aphins
n. pl. [NL. aphis, plant-louse] Fat soluble pigments derived from various aphids that impart a purple or black color to the whole insect.
aphodus
n.; pl. aphodi [Gr. aphodos, departure] (PORIFERA: Desmospongiae) The short channel connecting the flagellated chamber with the excurrent canal; see prosodus.
aphorism
n. [Gr. aphorizein, to define] The concise definition of a principle.
aphotic zone
That zone of ocean water that lies below 800 meters and which receives little or no light.
aphototropic
adj. [Gr. an, without; phos, light; tropein, to turn] Turning away from light.
aphrodisiac pheromone
(ARTHROPODA: Insecta) A pheromone that facilitates copulation.
aphytal zone
Those waters in which the penetration of light is too poor to support photosynthesis.
apian
adj. [L. apianus, of bees] Of or pertaining to bees.
apiary
n.; pl. -ies [L. apiarium, beehive] The area where bees are kept; a collection of hives maintained for honey production.
apicad
adv. [L. apex, tip; ad, toward] Toward the apex.
apical
adj. [L. apex, tip] Refers to the apex or top, as of a conical or spherical structure.
apical angle
1. (ARTHROPODA: Insecta) The angle of a wing at its apex. 2. (MOLLUSCA: Gastropoda) In a plane through the axis, that angle subtended between two straight lines that touch ...
apical area
1. (ARTHROPODA: Insecta) see petiole. 2. (MOLLUSCA: Polyplacophora) The short part of the periostracum and tegmentum on the head and intermediate valves that is adjacent ...
apical carina
(ARTHROPODA: Insecta) In ichneumonid Hymenoptera, the posterior transverse carina.
apical cell
1. A cell situated at the apex of a structure distinguished by location, shape, size and function. 2. (ARTHROPODA: Insecta) Apical testicular cell of Orthoptera, ...
apical chamber
(ARTHROPODA: Insecta) Pertaining to the germarium in the acrotrophic egg tubes.
apical cross vein
(ARTHROPODA: Insecta) A cross vein near the apex of the wing.
apical field
(ROTIFERA) The central anterior unciliated area of the corona.
apical lip notches
(NEMATA) Indented lip margins at the junction of the lips.
apical margin
(ARTHROPODA: Insecta) The outer margin of the wing; see costal margin, anal margin.
apical organ
A sensory organ located at the apex of trochophore larvae and some cestodes.
apical orifice
(MOLLUSCA) An opening at the top or apex of a shell.
apical plate
An external sensory organ of a primitive nervous system or cluster of nerve cells at the anterior pole of the body of certain arthropods and annelids.
apical scutellars
(ARTHROPODA: Insecta) In Diptera, the apical pair of marginal bristles on the scutellum; sometimes refers to the sub-apical scutellars, when the true apicals are absent.
apical spur
1. (ARTHROPODA: Insecta) The short bristles on the ventral surface of the tibia. 2. (MOLLUSCA) The initial pointed plug forming a posterior septum in truncate shells.
apical system
(ECHINODERMATA: Echinoidea) Plates surrounding the body organs of sea-urchins, found at the dorsal or aboral pole of the test; see coronal system.
apicalia
n. [L. apex, tip] (GNATHOSTOMULIDA) Paired sensory cilia on the head.
apices
pl. of apex.
apicobasal ridge or furrow
(ARTHROPODA: Crustacea) A longitudinal feature of barnacles, dividing the tergum from the remaining valve.
apiculate
adj. [L. dim. apex, tip] Pertaining to a short, abrupt point or points.
apiculture
n. [L. apis, honeybee; cultura, cultivation] (ARTHROPODA: Insecta) The culturing of bees; beekeeping.
apiculus
n. [L. dim. apex, tip] Any small apical tip or point.
apid venom gland
(ARTHROPODA: Insecta) A type of venom gland in which the single venom gland is widened into a saclike reservoir that contains glandular elements, but no muscles; see ...
apisthognathous
see opisthognathous.
apitoxin
n. [L. apis, honeybee; Gr. toxikon, poison] The main toxic constituent of bee venom.
apivorous
adj. [L. apis, honeybee; vorare, devour] Refers to feeding on bees.
aplasia
n. [Gr. an, without; plasma, formed or molded] 1. The entire failure of organs or tissue to develop. 2. Incomplete or faulty development; aplastic a; see agenesis.
apneumone
n. [Gr. an, without; pneuma, air] A substance emitted by a nonliving material that envokes a behavioral or physiological reaction favorable to the receiving organism, but ...
apneustic
adj. [Gr. an, without; pneustos, breath] 1. Lacking external breathing organs. 2. (ARTHROPODA: Insecta) Lacking spiracles, or supplied with nonfunctional spiracles, as in ...
apobiotic
adj. [Gr. apo, away; biotikos, of life] Of or pertaining to any change leading to diminished cells or tissues.
apocentric
adj. [Gr. apo, away; kentron, center] Deviating from the original type; see archecentric.
apochete
n. [Gr. apo, away; cheo, pour] (PORIFERA) An exhalant canal that extends from the apopyles to apopore.
apocrite
adj. [Gr. apo, away; krinein, to separate] (ARTHROPODA: Insecta) Pertaining to Hymenoptera in which the first abdominal segment is fused to the reduced metathorax to form a ...
apodal
adj. [Gr. a, without; pous, foot] Lacking feet or legs; apodous.
apodeictic
См. apodictal.
apodema
n. [Gr. apo, away; demas, body] An invagination of the cuticle that serves for muscle attachment and for strengthening of the body wall; see apophysis, apodome.
apodeme
См. apodema.
apoderma
n. [Gr. apo, away; derma, skin] (ARTHROPODA: Chelicerata) The membrane developed during resting stage of instars of certain Acari.
apodictal
adj. [Gr. apodeiktos, proving fully] Being evident beyond contradiction; clearly proving.
apodictic
См. apodictal.
apodome
n. [Gr. apo, away; L. domus, roof] (ARTHROPODA) The internal portions of a skeleton, consisting of both apodeme and apophysis; sometimes used as synonymous with apodeme. ...
apodous
see apodal.
apodous larvae
(ARTHROPODA) Larvae without legs and with reduced head, that require maternal deposition in or on a food source.
apoenzyme
n. [Gr. apo, away; en, in; zyme, yeast] The protein portion of an enzyme that cannot function without a coenzyme; see holoenzyme.
apogamete
n. [Gr. apo, away; gamete, spouse] A gamete formed by apomixis.
apogamy
see apomixis.
apolar
adj. [Gr. an, without; polos, pivot pole] Lacking a pole; without radiating processes.
apolegamic
adj. [Gr. apolegein, to choose; gamos, marriage] Pertaining to sexual selection.
apolysis
n. [Gr. apo, away; lysis, loosen] 1. (ARTHROPODA) The first process of molting, characterized by the detachment of the old cuticle from the underlying hypodermal ...
apomict
n. [Gr. apo, away; miktos, mixed] Any organism produced by apomixis.
apomictic parthenogenesis
No reduction division occurs, so that the offspring have the same genetic constitution as the mother and all are female.
apomixis
n. [Gr. apo, away; mixis, mixing] Botanical term sometimes used in invertebrates; see parthenogenesis.
apomorph
n. [Gr. apo, away; morphe, form] A derived character.
apomorphic
a; see plesiomorphy.
apomorphy
n. [Gr. apo, away; morphe, form] A term pertaining to derived characters, normally used in cladistic taxonomy.
apophysary
see apophysis.
apophysis
n.; pl. -ses [Gr. apo, away; phyein, to grow] 1. An internal or external tubercular or elongate process of the body wall; a prominence, swelling or expansion; see ...
apophystegal plates
(ARTHROPODA: Insecta) In Orthroptera, plateor blade-like sclerites covering the gonapophyses.
apopore
n. [Gr. apo, away; poros, passage] (PORIFERA) An aperture forming an exit from the apochete; may be equivalent to an oscule.
apopyle
n. [Gr. apo, away; pyle, gate] (PORIFERA) An exhalent aperture from a choanocyte chamber.
aporrhysa
n. pl. [Gr. aporrhyein, to flow away] (PORIFERA) The exhalent canals; see epirrhysa.
aposematic
adj. [Gr. apo, away; sema, signal] Warning coloration or structures that repel predators, also including movements, sounds, smells, etc; see allosematic color, sematic.
aposeme
n. [Gr. apo, away; sema, signal] A population in which all the individuals, even though taxonomically distinct, share the same aposematic coloration.
apostatic
adj. [Gr. apostates, deserter] Widely departing from the norm; said of a phenotype that differs strikingly from the search image of a predator.
aposymbiotic
adj. [Gr. apo, away; syn, together; bios, life] Referring to an organism separated from its symbiotes; symbiote- free; usually refers to mutualistic symbiotes; see ...
apotele
n. [Gr. apo, away; telos, end] (ARTHROPODA: Chelicerata) The terminal eudesmatic segment of the appendages of mites, generally constituting two tendons and two articulation- ...
apotome
n. [Gr. apo, away; tomos, a cut] A part or subdivision appearing as if separated from the whole.
apotorma
n.; pl. -mae [Gr. apo, away; tormos, socket] (ARTHROPODA: Insecta) In Scarabaeoidea larvae, a process that extends forward from the torma between the pternotorma and the ...
apotype
see hypotype.
apotypic
adj. [Gr. apo, away; typos, type] Varying from a type.
apparatus
n.; pl. -ratus, -ratuses [L. apparatus, equipment] Any group of structures or parts that unite together in a common function.
apparition
n. [L. appareo, manifest] Something appearing.
appeasement behavior
That which follows after the attack of one animal on another of the same species with the loser assuming a submissive attitude.
appeasement substance
The secretion by a social parasite of attractive substances that reduce aggression in a host insect and aid the parasite\'s acceptance by the host colony.
appendage
n. [L. ad, to; pendere, to hang] A structure attached or appended to a larger structure, as parts or organs that are attached to the body of various invertebrates.
appendicle
n. [L. ad, to; pendere, to hang] A small appendage or appendix. appendicular adj..
appendiculate
adj. [L. ad, to; pendere, to hang] Bearing or forming small appendages.
appendiculate cell
(ARTHROPODA: Insecta) In Hymenoptera, a small cell just beyond the apex of the marginal cell of the wing.
appendicule
n. [L. ad, to; pendere, to hang] (NEMATA) A large, single, ventral, extensible preanal supplementary male organ.
appendiculum
n. [L. appendicula, small appendage] (CNIDARIA: Scyphozoa) The remainder of the partial veil on the pileus rim of jellyfish.
appendifer
n. [L. ad, to; pendere, to hang; ferre, to carry] (ARTHROPODA: Trilobita) A ventral projection for the attachment of thoracic muscles.
appendix
n.; pl. -dixes, -dices [L. ad, to; pendere, to hang] Any supplementary or additional piece or part appended to a regular structure.
appendix interna
(ARTHROPODA: Crustacea) In Malacostraca, the median process of the pleopodal endopod uniting members of each pair; stylamblys.
appendix masculina
(ARTHROPODA: Crustacea) In Isopoda, the modified second (sometimes first also) pleopod(s) in the form of a long, often grooved, rodlike organ that functions as a copulatory ...
appendotomy
n. [L. appendix, appendage; Gr. tome, a cutting] The loss of appendages; see autospasy, autotilly, autotomy.
appose
v.t. [L. ad, to; ponere, to put] To place opposite or before; to put, apply, or add one thing to another, to place in juxtaposition.
apposition
n. [L. ad, to; ponere, to put] 1. Juxtaposition. 2. The growth of a structure by the successive deposition of layers on its outside; see intussusception.
apposition eye
(ARTHROPODA) The compound eye of diurnal insects and crustaceans in which the rhabdom reaches the crystalline cone, it absorbs oblique rays of light in the pigmented ...
apposition image
A mosaic image.
appressed
adj., adv. [L. ad, to; premere, to press] Pressed or closely applied against something; adherent.
approximate
adj. [L. ad, to; proximare, to come near] Situated near or close together.
aprostatic
adj. [L. an, without; pro, before; stare, to stand] (ANNELIDA: Oligochaeta) Lacking prostates.
aptera
n. pl. [Gr. an, without; pteron, wing] (ARTHROPODA: Insecta) Insects without wings; formerly an ordinal term including the fleas, lice and other wingless forms.
apterergate
n. [Gr. an, without; pteron, wing; ergate, worker] (ARTHROPODA: Insecta) A wingless worker in vespid wasps, that are normally winged.
apterodicera
adj. [Gr. an, without; pteron, wing; dikeros, twohorned] (ARTHROPODA: Insecta) A wingless insect bearing two antennae.
apterogyne
n. [Gr. an, without; pteron, wing; gyne, female] (ARTHROPODA: Insecta) A wingless female social insect that is normally winged.
apterous
adj. [Gr. an, without; pteron, wing] (ARTHROPODA: Insecta) Wingless, without wings or winglike expansions; exalate.
apterous neoteinic
see ergatoid reproductive.
apterygogenea
n. pl. [Gr. an, without; pteryx, wing; genos, race] (ARTHROPODA: Insecta) Insects that are wingless in all stages and assumed to be descended from wingless ancestors; see ...
Apterygota
См. apterygote.
apterygote
n. [Gr. an, without; pterygion, wing] A subclass of primitively wingless insects containing the bristletails, silverfish and rock jumpers; see Pterygota.
aptychus
n. [Gr. an, without; ptychos, fold] (MOLLUSCA) A double calcareous plate found in many fossil ammonites, assumed to be an operculum.
apyrase
n. [Gr. an, without; pyr, fire; -ase, enzyme] An enzyme that functions in the utilization of energy.
apyrene
adj. [Gr. an, without; pyren, kernel] (MOLLUSCA) Designates nonfunctional sperm with no flagella or chromatin; see eupyrene, oligopyrene.
aquamarine
n. [L. aqua marina, sea water] Blue, blue-green or green in color.
aquatic
adj. [L. aqua, water] Pertaining to living or growing in water.
aqueous
adj. [L. aqua, water] Of or of the nature of water; watery.
aqueous humor
The fluid in the anterior chamber of the eye; see vitreous humor.
aquiferous
adj. [L. aqua, water; ferre, to bear] (MOLLUSCA) Supplying water or watery fluid, as the aquiferous canals.
arachnactis
n. [Gr. arachne, spider; aktis, ray] (CNIDARIA: Anthozoa) The larval stage of anemone-like cerianthids.
arachnid
n. [Gr. arachne, spider] A class of the phylum Arthropoda that includes the scorpions, mites, spiders, harvestmen and ticks, etc.
Arachnida
См. arachnid.
arachnidism
n. [Gr. arachne, spider; ismos, denoting condition] (ARTHROPODA: Chelicerata) Envenomation by an arachnid, such as a spider, tick or scorpion; see arachnism.
arachnidium
n. [Gr. arachne, spider] (ARTHROPODA: Chelicerata) The spinning apparatus of spiders, consisting of the spinning glands and their ducts and the spinnerets; arachnidial adj.. ...
arachnism
n. [Gr. arachne, spider; ismos, denoting condition] (ARTHROPODA: Chelicerata) Poisoning, or poisoned condition due to envenomation by a spider; see arachnidism.
arachnoid
См. arachnoideal.
arachnoideal
adj. [Gr. arachne, spider; eidos, form] (ARTHROPODA: Chelicerata) 1. Resembling a member of the Arachnida. 2. Resembling a spider\'s web, thin and fine, filmy.
arachnologist
n. [Gr. arachne, spider; logos, discourse] One who studies the arachnids.
aragonite
n. [fr. Aragon, in Spain] 1. A calcium carbonate, dimorphous with calcite. 2. The innermost layer of a shell. 3. (CNIDARIA: Anthozoa) The skeleton of coral, produced by ...
arakoderan
adj. [Gr. arake, bowl; deros, skin] (NEMATODA: Secernentea) Pertaining to a caudal ala that completely surrounds the cloacal area; see leptoderan, peloderan.
araneiform
adj. [L. aranea, spider; forma, form] Spiderlike in appearance.
araneology
n. [L. aranea, spider; Gr. logos, discourse] That branch of zoology that treats only of spiders.
arboreal
adj. [L. arbor, tree] Pertaining to or living in or among trees.
arborescent
adj. [L. arbor, tree] Tree-like in character or appearance; branching like a tree, as some species of mollusks and corals.
arborizations
n. pl. [L. arbor, tree] A tree-like branching of terminal fibers of axons or collaterals.
arbovirus
n. Any of a group of (ar)thropod-(bo)rne (virus)es, including the causative agents of yellow fever, viral encephalitis and certain febrile infections, that are transmitted to ...
arc
n. [L. arcus, bow] Any object having a bowlike curvature.
arcade
n. [L. arcus, arch] (NEMATODA: Secernentea) Lateral collecting tubules of the excretory system of Ascaris.
arcade cells
(NEMATA) The nine anteriormost cells that are believed to form the lips, two opposite each esophageal lumen radius and one opposite each sector.
archaeocytes
n. pl. [Gr. arche, beginning; kytos, container] 1. (PORIFERA) Large, wandering amoebocytes with multiple phagosomes in the mesenchyme; nurse cells; trophocytes. 2. A ...
archaestomatous
adj. [Gr. arche, beginning; stoma, mouth] (ANNELIDA) Describing a group, Archaeostomata of former classifications, with a mouth derived directly from the blastopore of the ...
archebiosis
n. [Gr. arche, beginning; biosis, manner of life] Abiogenesis.
archecentric
adj. [Gr. arche, beginning; kentron, center] Designating or pertaining to an original type; see apocentric.
archedictyon
n. [Gr. arche, beginning; diktyon, net] (ARTHROPODA: Insecta) The irregular network of cuticular ridges on the wings of many fossils.
archegenesis
n. [Gr. arche, beginning; genesis, beginning] Abiogenesis.
archencephalon
see archicerebrum.
archenteric pouch
One of the paired, segmented, dorsoventral prominances of the archenteron from which the mesoderm derives.
archenteron
n. [Gr. arche, beginning; enteron, intestine] The primitive digestive cavity of many invertebrates, formed by gastrulation; the gastrocoele; precursor to the gut.
archeocyte
see archaeocytes.
archetype
См. architype.
Archiacanthocephala
n. [Gr. arche, beginning; akantha, thorn; kephale, head] A class of Acanthocephala that are parasites of predacious birds and mammals; insects and myriapods are the ...
archibenthic
adj. [Gr. arche, beginning; benthos, depths of sea] Refers to the continental deep-sea zone, extending from the edge of the continental shelf (200-400 m.) to depths of about ...
archicephalon
n. [Gr. arche, beginning; kephale, head] The primitive annelid-arthropod head; the prostomium.
archicerebrum
n.; pl. -bra [Gr. arche, beginning; L. cerebrum, brain] 1. (ANNELIDA) The ganglionic nerve mass of a prostomium. 2. (ARTHROPODA) The primitive suprastomodeal nerve mass ...
archidictyon
see archedictyon.
archigastrula
n. [Gr. arche, beginning; gaster, stomach] A type of gastrula in which the endoderm is produced by invagination; emboly.
archigenesis
see abiogenesis.
archinephridium
n. [Gr. arche, beginning; nephros, kidney] An excretory organ of many invertebrate larvae; a solenocyte.
archiplasm
n. [Gr. arche, beginning; plasma, formed or molded] A former name for the substance of the spindle fibers and astral rays; was thought to exist during the entire cell ...
Archiptera
see Pseudoneuroptera.
architomy
n. [Gr. arche, beginning; tome, cut] (ANNELIDA) Designating reproduction by fission, with regeneration after separation of heads and/or tails; see paratomy.
architype
n. [Gr. arche, beginning; typos, type] A hypothetical ancestral type arrived at by the elimination of specialized characters of known later forms; see phylogeny.
archoophorans
n. pl. [Gr. arche, beginning; pherein, to carry] (PLATYHELMINTHES: Turbellaria) 1. Individuals with modified cleavage in which yolk is stored in the oocytes; entolecithal ...
arciform
adj. [L. arcus, bow; forma, shape] Being arcuate; shaped like a bow or arch.
arctic
adj. [Gr. arktos, bear] 1. Pertaining to the region of the North Pole within the Arctic Circle. 2. Pertaining to the high latitude regions, that may or may not be inside the ...
arcticoid teeth
(MOLLUSCA: Bivalvia) Heterodont teeth intermediate between corbiculoid and lucinoid types.
arctogaea
n. [Gr. arktos, bear; gaia, the earth] One of the primary zoogeographic zones comprising North America (except Central America), Europe, Asia and Africa.
arcuate
adj. [L. dim. arcus, bow] 1. Pertaining to being shaped like an arc; arch-like. 2. (MOLLUSCA: Bivalvia) Referring to the ventral edge in some pelecypods. 3. (PORIFERA) ...
arcuate vein
(ARTHROPODA: Insecta) The first jugal vein.
arculus
n. [L. dim. arcus, bow] (ARTHROPODA: Insecta) A basal cross vein between the radius and the cubitus.
are
n. [L. area, open place] A metric area measurement of a square, with each side 10 meters in length.
area
n. [L. area, open place] (BRYOZOA: Gymnolaemata) In anascans, the space occupied by the frontal membrane.
arenaceous
adj. [L. arena, sand; -aceus, having the nature of] Sandy, or the nature of sand.
arenicolous
adj. [L. arena, sand; colere, to inhabit] Burrowing in or inhabiting sand; see psammophilous.
areocel
see accessary cell.
areola
n.; pl. -lae, -las (areoles) [L. dim. area, small open place] 1. (ARTHROPODA: Crustacea) In crayfish, the longitudinal strip between the brachiocardiac grooves and posterior ...
areolation
n. [L. area, open space] 1. Any small space, bounded by some part differing in color or structure. 2. (ARTHROPODA: Insecta) Spaces founded by nervures in the wings. 3. ...
areole
see areola.
areolet
n. [L. dim. area, small open space] (ARTHROPODA: Insecta) A small cell in a wing.
argentaffin
adj. [L. argentum, silver; affinis, related] Of or pertaining to the taking of a silver stain; an argyrophil.
argentaffin cell
См. argentaffine cell.
argentaffine cell
Any cell that stains readily by silver techniques.
argenteous
adj. [L. argentum, silver] Silver-like, silvery, white, shinning.
argentophilic cells
(ARTHROPODA: Insecta) In aquatic larvae, specialized cells for ion uptake in the anal papillae or rectal gill.
argillaceous
adj. [L. argilla, white clay] Containing or consisting of, or like clay; clayey.
argyrophil
adj. [Gr. argyros, silver; philein, to love] Pertains to staining readily with silver dyes; argentaffin.
arista
n.; pl. -tae [L. arista, awn] A bristlelike appendage.
aristate
adj. [L. arista, awn] Having an arista; aristate antenna.
aristopedia
n. [L. arista, awn; podos, foot] (ARTHROPODA: Insecta) A developmental deviation in which the arista may mature as a leg.
Aristotle's lantern
(ECHINODERMATA: Echinoidea) A complicated masticating apparatus consisting of several ossicles surrounding the mouth of sea urchins; called Aristotle\'s lantern because it ...
aristulate
adj. [L. dim. arista, awn] Bearing a short bristle.
ark
n. [L. arca, chest] (MOLLUSCA: Bivalvia) A marine arcoid bivalve with an equivalve shell; a heavy box-like shell; an arkshell.
arm
n. [A.S. arm, forelimb] 1. Anything resembling or corresponding to an arm. 2. (ECHINODERMATA) a. In Asteroidea, the radial extension of the body surrounding the axis; the ...
armate cercaria
(PLATYHELMINTHES: Trematoda) A larva of the xiphidiocercariae group with oral and ventral suckers unequal, without a virgula organ and with a Y-shaped excretory bladder.
armature
n. [L. armare, to arm] Defensive or protective structures of invertebrates, such as spinous or chitinous processes in the form of hooks, horns, teeth, spines and claws on ...
armilla
n.; pl. -lae [L. armilla, bracelet] Bearing a bracelet-like ring or annulus; armillate adj..
arolium
n.; pl. -ia [Gr. arole, protection] (ARTHROPODA: Insecta) A medium lobe or pad-like cushion of the foot. a. Between the claws of Orthoptera. b. The base of each tarsal ...
aromorphosis
n.; pl. -ses [Gr. airein, to raise; morphosis, shaping] An advancement in organization of an organism, without a marked increase in specialization; an aromorph; see ...
arrhenogeny
n. [Gr. arrhen, male; genos, offspring] The condition of producing only male offspring; see monogeny, thelygeny.
arrhenoidy
n. [Gr. arrhen, male; eidos, form] (NEMATODA: Secernentea) Sex reversal from female to male; recognized by males having two testes, instead of one; arrhenoid adj..
arrhenoplasm
n. [Gr. arrhen, male; plasma, formed or molded] The male element of idioplasm.
arrhenotoky
n. [Gr. arrhen, male; tokos, birth] The haplodiploid parthenogenesis in which males arise from unfertilized, haploid egg cells; see thelyotoky.
arsenosomphic
adj. [Gr. arsen, male; somphos, porous] (ANNELIDA: Oligochaeta) Pertaining to earthworms with male terminalia.
artatendon
n. [L. artus, joint; tendere, to stretch] (ARTHROPODA: Insecta) The tendon articulating the post-tarsus.
artefact
see artifact.
artenkreis
see superspecies.
arterial
adj. [L. arteria, artery] Pertaining to an artery.
arteriole
n. [L. dim. arteria, artery] A small artery.
artery
n. [L. arteria, artery] A vessel conveying blood from the heart to the tissues.
arthral
adj. [Gr. arthron, joint] Pertaining to a joint.
arthrium
n. [Gr. arthron, joint] (ARTHROPODA: Insecta) In Coleoptera, minute tarsal joints, trimera (3 tarsal joints) and tetramera (4 tarsal joints).
arthrobranchia
n.; pl. -iae [Gr. arthron, joint; branchia, gills] (ARTHROPODA: Crustacea) In Decapoda, a gill attached to the articulating membrane between the appendage and body; ...
arthroderm
n. [Gr. arthron, joint; derma, skin] (ARTHROPODA) The outer covering of skin, or the outer body-wall.
arthrodial membrane
(ARTHROPODA) Articular membranes that permits unrestricted motion; flexible joints.
arthromere
n. [Gr. arthron, joint; meros, part] (ARTHROPODA) A segment, somite or metamere.
arthrophragm
see endophragm.
arthropleure
n. [Gr. arthron, joint; pleura, side] (ARTHROPODA) That portion of the body that bears the limbs.
arthropod
n. [Gr. arthron, joint; pous, foot] A phylum of invertebrates that contains the chitinous segmented, exoskeletoned, jointed-legged animals, such as centipedes, millipedes, ...
Arthropoda
См. arthropod.
arthropodin
n. [Gr. arthron, joint; pous, foot] (ARTHROPODA) A protein constituent part of the chitinoproteinic structures.
arthropodization
n. [Gr. arthron, joint; pous, foot] (ARTHROPODA) Evolutionary development of the combination of characteristics associated with arthropods, including the chitinous ...
arthrostracous
adj. [Gr. arthron, joint; ostrakon, shell] (ARTHROPODA: Crustacea) Having the thorax and abdomen segmented, and bearing seven pairs of thoracic legs.
article
n. [L. dim. artus, joint] 1. A distinct segment or jointed part or structure. 2. (ARTHROPODA) a. In Chelicerata, the serrated process on the chelicera of a tick. b. In ...
articulamentum
n. [L. articulare, to divide] (MOLLUSCA: Polyplacophora) The shell layer between the tegmentum and hypostracum, that is composed of several separate components of ...
articular
adj. [L. articulare, to divide] Pertaining to a joint.
articular area
(ARTHROPODA: Insecta) The basal portion of a wing.
articular corium
see articular membrane, corium.
articular furrow
(ARTHROPODA: Crustacea) A groove near the tergal margin of the scutum, or scutal margin of the tergum, forming part of articulation between the two valves of barnacles. ...
articular membrane
(ARTHROPODA) The nonsclerotized, flexible membrane between the segments of arthropods, and the joints of arthropod appendages.

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