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congenital disease
A disease present in an animal at birth; not necessarily inherited.
congested
adj. [L. congestus, heap together] Overcrowded; distended.
congestin
n. [L. congestus, heap together] (CNIDARIA: Anthozoa) The toxin of sea anemone tentacles.
conglobate
adj. [L. cum, together; globatus, make into a ball] Gathered together into a ball or rounded structure; spherical.
conglobate gland
see phallic gland.
conglomerate
adj. [L. cum, together; agglomeratus, gathered into a mass] Irregularly grouped in spots; massed together; bunched or crowded.
congression
n. [L. congressus, meeting] The movement of chromosomes to the spindle equator during mitosis.
conjoined
adj. [L. cum, together; jungere, to join] United or joined together; adnate.
conjugation
n. [L. conjugare, to join together] Denotes coupling, connecting or uniting chromosomes, nuclei, cells, or individuals; conjugate adj..
conjunctiva
n.; pl. -tivas [L. cum, together; jungere, to join] (ARTHROPODA: Insecta) The membranous infolded portion of the segments of the body-wall; see intersegmental membrane.
conjunctive
adj. [L. cum, together; jungere, to join] Cojoining, connecting or connective.
connate
adj. [L. connatus, born together] Originating together; fused together or immovably united.
connective
n. [L. connexus, join] A longitudinal cord of nerve fibers connecting successive ganglia.
connective tissues
Tissues with cells that are irregularly distributed through a relatively large amount of intercellular material.
connector neurone
see association neuron.
connexiva
n. pl.; sing. -vum [L. connexus, join] (ARTHROPODA: Insecta) The lateral flanges (laterotergites or paratergites) of the abdomen, where the ventral plates are attached to ...
connivent
adj. [L. connivere, to close the eyes] Converging or coming close together; arching inward so the points meet.
conoid
adj. [Gr. konos, cone; eidos, form] Having the form of a cone; conoidal; see cyrtoconoid, coeloconoid.
conotheca
n. [Gr. konos, cone; theke, case] (MOLLUSCA: Cephalopoda) The thin integument of a phragmocone.
conscutum
n. [L. cum, together; scutum, shield] (ARTHROPODA: Chelicerata) The dorsal shield at the level of the anterior two pairs of legs, formed by the scutum and alloscutum ...
consensual
adj. [L. consensus, agreement] Pertaining to an involuntary action or movement correlated with a voluntary action or movement.
conservative characters
Characters that change slowly during evolution.
consociation
see myrmecobiosis.
consocies
n. pl. [L. cum, with; socius, companion] 1. A portion of an association characterized by one or more of the dominants of the association. 2. A portion of an association ...
consortism
n. [L. consortium, fellowship] Symbiosis in which the relationship between organisms is a fellowship; see helotism.
conspecific
adj. [L. cum, together; species, particular kind; facare, to make] Pertaining to individuals or populations belonging to the same species.
consperse
adj. [L. conpersus, besprinkled] Thickly and irregularly scattered with minute markings.
constant
n. [L. constare, to stand firm] An invariable or fixed quantity.
constricted
adj. [L. constrictus, drawn together] Narrowed; compressed or drawn together at some point.
constriction
n. [L. constrictus, drawn together] 1. Any constricted part or place. 2. An unspiralized region of a chromosome at metaphase.
constrictor
n. [L. constrictus, drawn together] A muscle that compresses or constricts a cavity, orifice, or organ.
constrictor vulvae
(NEMATA) Muscles that function to close the vulva; possibly the large sphincter of the vagina; see dilator vulvae.
consute
adj. [L. consuere, to sew together] Having minute stitch-like markings, differing in color from the general surface.
conterminous
adj. [L. cum, together; terminus, boundry] 1. Touching at the boundry, contiguous. 2. Having like bounds or limits.
contiguous
adj. [L. contiguus, bordering] Touching or adjoining at the edge.
continental drift
The hypothetical movement of continents across the surface of the earth.
continuous variation
Individuals differing from each other by small steps, often just barely discernible; see discontinuous variation.
contorted
adj. [L. contortus, twisted together] Twisted or straining out of shape or place.
contour
n. [L. cum, with; tornare, to turn] The outline; the periphery.
contract
v. [L. cum, with; trahere, to draw] To draw together; to reduce in size; to shrink; contractile adj..
contractile tubules
(SIPUNCULA) Numerous, short and simple, or longer and branching tubules originating from the contractile vessel and extending into the body cavity; polian tubules.
contractile vessel(s)
(SIPUNCULA) A single or pair of tubes attached to the surface of the esophagus, anteriorly communicating with the fine vessels in the tentacles and ending blindly posteriorly; ...
contractility
n. [L. cum, together; trahere, to draw] The capability of muscle fibers to contract.
contractin
n. [L. cum, together; trahere, to draw] Thought to be neurohumor that induces contraction of the chromatophores.
contracture
n. [L. cum, together; trahere, to draw] Contraction of muscles enduring after stimulus has ceased.
contralateral
adj. [L. contra, against; latus, side] Pertaining to, or associated with similar parts on the opposite side; see ipsilateral.
contranatant
adj. [L. contra, against; natare, to swim] Swimming or migrating against the current; see denatant.
conule
n.; pl. conuli [L. dim. conus, cone] (PORIFERA) The tentlike elevation of the surface membrane; conulose adj..
conus
n.; pl. coni [L. conus, cone] Any cone-shaped structure.
convergence
n. [L. convergere, to incline] Morphological similarity in distantly related forms; homoplasy.
convergent
adj. [L. convergere, to incline] 1. Tending to approach. 2. Organisms having similar characters.
convergent evolution
Having similar adaptive structures among unrelated organisms due to environmental surroundings.
converse eyes
Eyes in which the distal ends of retinal cells face the exterior of the cup or vesicle; see inverse eyes.
convex
adj. [L. convexus, arched outward] Having a curved, rounded surface, as that of an external segment of a globe; see concave.
convex vein
(ARTHROPODA: Insecta) One that tends to fold upward or follows the ridges of the wing.
convexity
n. [L. convexus, arched outward] (MOLLUSCA: Bivalvia) The degree to which the shell is convex.
convolute
adj. [L. convolutus, rolled up] 1. Rolled or wound upon themselves. 1. (ARTHROPODA: Insecta) A wing rolled around its body. 2. (MOLLUSCA) The last whorl of a shell ...
convoluted gland
(ARTHROPODA: Insecta) In some aculeates, a part of the venom producing structures invaginated into the venom sac; in formacine ants it is external to this sac; not found ...
convolution
n. [L. convolutus, rolled up] A coiling or twisting, as of something rolled or folded on itself.
copal
n. [Ab.Am. copalli, a resin from tropical leguminous trees] A complex mixture of amber-like resins from various tropical trees.
coparasitism
n. [L. cum, together; parasitus, one who eats at the table of another] The parasitism of a host by more than one parasite.
Cope's rule
The generalization in which there is a steady increase in size in phyletic series.
copepodid
n. [Gr. kope, oar; pous, foot] (ARTHROPODA: Crustacea) Postnaupliar developmental stage of copepods, often quite similar in body form to the adult.
coprobiont
n. [Gr. kopros, dung; bios, life] A coprozoic organism; a dung living organism.
coprophagous
adj. [Gr. kopros, dung; phagein, to eat] Feeding upon feces; scatophagous; merdivorous; coprophagy n.
coprophilic
adj. [Gr. kopros, dung; philos, loving] Growing in or on dung; coprozoic.
coprozoite
n. [Gr. kopros, dung; zoon, animal] A dung-inhabiting or coprozoic animal; coprozoic adj..
copularium
n. [L. copulare, to couple; -arium, place for] (ARTHROPODA: Insecta) An initial nest cell founded by the primary reproductives in the establishment of a termite colony.
copulate
v.i. [L. copulare, to couple] To unite in sexual intercourse.
copulation
n. [L. copulare, to couple] Pairing, coupling or joined; sexual union of male and female; to copulate.
copulation chamber
(ARTHROPODA: Insecta) A nuptial chamber excavated by certain Scolytinae beetles in the tunnel, wherein copulation takes place.
copulatory bursa
see bursa copulatrix, bursa.
copulatory cap
(ACANTHOCEPHALA) The mucilaginous, proteinaceous material thought to aid the union of partners during copulation and insemination that soon hardens to form a covering around ...
copulatory chaetae
(ANNELIDA: Oligochaeta) Those that appear near or in the same segment as the spermathecae in earthworms; sometimes referring to similar setae in an adjacent, but athecal ...
copulatory chamber
(ANNELIDA: Oligochaeta) An invagination containing the male pore that reaches through the body wall into the coelom; bursa copulatrix; copulatory pouch.
copulatory organ
Organs for the transfer or reception of sperm during copulation.
copulatory pouches
(ANNELIDA: Oligochaeta) The spermathecae of earthworms in older publications.
copulatory sac
Bursa copulatrix, copulatory pouch, seminal receptacle, seminal bursa.
copulatory setae
См. copulatory chaetae.
copulatory warts
(NEMATA) In males, enlarged genital papillae.
copulo
[L. copulare, to couple] "In copulo" correct form for describing copulation.
coquina
n. [Sp. shellfish, cockle] A whitish limestone made up of marine shell fragments and corals, used for roadbeds and building materials.
cor frontale
(ARTHROPODA: Crustacea) Special pulsating structure or accessory heart formed from enlargement of the anterior median artery in front of the triturating stomach in ...
coracidium
n. [Gr. korax, crow] (PLATYHELMINTHES: Cestoda) 1. An onchosphere or hexacanth embryophore. 2. The ciliated, freeswimming onchosphere of a fish tapeworm hatching from ...
coral
n. [Gr. korallion, coral] (CNIDARIA) The calcium carbonate exterior skeleton formed by corals inhabiting warm shallow waters, masses of which form reefs and islands.
coral reef
A calacareous mass formed by colonies of coral organisms; types include:. 1. Fringing reef, extending out to a quarter of a mile from shore. 2. Barrier reef, separated by a ...
coralliferous
adj. [Gr. korallion, coral; ferre, to bear] Pertaining to coral.
coralline
n. or adj. [Gr. korallion, coral] 1. Any corallike animal, as certain Hydrozoa and Bryozoa. 2. Resembling coral in the pinkish-red color.
corallite
n. [Gr. korallion, coral] The skeleton of an individual coral polyp.
coralloid
adj. [Gr. korallion, coral] Having the form or appearing like coral; coralliform.
corallum
n. [Gr. korallion, coral] The skeleton of a solitary polyp or a colony of corals.
corbel
n. [L. corbis, basket] (ARTHROPODA: Insecta) An ovate area of fringed bristles at the distal end of the tibia in certain coleopterans.
corbicula
n.; pl. -lae [L. dim. corbis, basket] (ARTHROPODA: Insecta) A smooth area on the outer surface of the hind tibia of Apidae, surrounded on each side by a fringe of long ...
corbiculate
adj. [L. dim. corbis, basket] Having the shape of a small basket; pertaining to corbiculae.
corbiculoid teeth
(MOLLUSCA: Bivalvia) Having 3 cardinal teeth in each valve and a median tooth below the beak in the right valve; see arcticoid teeth.
corbula
n. [L. corbula, little basket] (CNIDARIA: Hydrozoa) A phylactocarp with leaflike protective branches arching over the enclosed gonangia.
corcula
n. [L. dim. cordis, heart] (ARTHROPODA: Insecta) A chamber of the dorsal vessel, through which the blood flows.
cord
n. [L. chorda, cord] 1. Any long, rounded cordlike structure. 2. (MOLLUSCA: Gastropoda) A round-topped, moderately coarse spiral or transverse linear sculpture on a ...
cordate
adj. [L. cordis, heart] Having the shape of a heart; cordiform.
cordlike
see restiform.
cordon
n. [L. chorda, cord] (NEMATA) Longitudinal, cuticular cordlike thickening extending posteriorly from near the oral opening; may be straight, recurved or form loops; ...
cordotonal organ
see proprioceptor.
cordylus
n.; pl. cordyli [Gr. kordyle, swelling] (CNIDARIA: Hydrozoa) Small clubs composed of large gastrodermal cells covered by a thin epidermis, mounted on sensory cushions ...
core
n. [L. cordis, heart] 1. The central part of anything. 2. (BRYOZOA: Stenolaemata) Either laminated or nonlaminated skeletal material, or a combination of both, that form the ...
corema
См. corematis.
corematis
n.; pl. -ata [Gr. korema, broom] (ARTHROPODA: Insecta) Paired eversible sacs of the ventro-lateral regions of certain male Lepidoptera, containing hairpencils or brushes, ...
coreum
see corium.
coriaceous
adj. [L. corium, leather] Tough and leathery; of leathery texture.
coring
adj. [L. cor, heart] (PORIFERA) A term used to describe the contents of a fiber, either spicules or sand and spicule debris taken up by the sponge.
corium
n.; pl. -ria [L. corium, leather] (ARTHROPODA) 1. The membranes of the flecture areas (articular and intersegmental membranes) in segmented appendages. 2. The middle ...
cormidial orifice
(BRYOZOA: Gymnolaemata) Skeletal support for the zooidal orifice produced by more than one zooid.
cormidium
n.; pl. cormidia [Gr. dim. kormos, trunk of a tree] (CNIDARIA: Hydrozoa) A siphonophore gastrozooid with a tentacle and one or more gonophores of one sex; sensu stricto, ...
cormopod(ite)
see thoracopod.
Cormopoda
see Bivalvia.
cormus
n. [Gr. kormos, trunk of a tree] 1. The body, colony, or polypary of a compound animal. 2. (ARTHROPODA: Crustacea) see thorax.
cornea
n.; pl. -neas [L. corneus, of horn] The transparent cuticle covering the ommatidia of a compound eye; corneal adj..
corneagen cells
The epidermal cells that produce the cornea, and later produce the corneal pigment cells.
corneagen layer
That part of the epidermis extending beneath the cornea, normally consisting of two cells in each ommatidium; when absent, the cornea is secreted by the crystalline cone ...
corneal facet
One of the lenses of modified cuticle covering an ommatidium or the array of lenses that gives a compound eye its faceted appearance.
corneal lens
(ARTHROPODA: Insecta) The modified cuticle covering the ocellus.
corneal pigment cells
(ARTHROPODA) The two corneal cells that envelop each crystalline cone of a compound eye; in the developing eye, distal to the cone they secrete the corneal lense; also ...
cornein
n. [L. corneus, of horn] (CNIDARIA) The organic basis of corals.
corneous
adj. [L. corneus, of horn] Resembling horn; of hornlike texture; corniform.
cornicle
n. [L. dim. cornu, horn] (ARTHROPODA: Insecta) In aphids, one of a pair of movable, flap covered, pre-caudal tubes projecting from the dorsum of segment 6, that expells ...
corniculate
adj. [L. dim. cornu, horn] Having horns or small horn-like structures.
corniculum
n.; pl. -ula [L. dim. cornu, horn] (ARTHROPODA: Insecta) A small horn-like process of the cuticula of larvae, often present on the suranal plate.
corniculus
n.; pl. -uli [L. dim. cornu, horn] 1. (ARTHROPODA: Chelicerata) In some mites, a horn-shaped infracapitular seta on the malapophysis. 2. (ARTHROPODA: Insecta) In ...
cornification
n. [L. dim. cornu, horn; facere, to make] Formation of horn or horn-like material; keratinization.
corniform
adj. [L. cornu, horn; forma, shape] A long mucronate or pointed process similar to the horn of an ox.
cornu
n.; pl. cornua [L. cornu, horn] 1. A horn or horn-shaped structure. 2. (ARTHROPODA: Insecta) The horn-like processes in the cephalo-pharyngeal skeleton of dipterous ...
cornuti
n. pl.; sing. cornutus [L. cornutus, horned] (ARTHROPODA: Insecta) Sclerotized armature of the aedeagus of male Lepodoptera, in the form of slender single spines, scale-like ...
corona
n. [L. corona, crown] 1. A crownlike structure or organ of various invertebrates. 2. (ARTHROPODA: Insecta) In Lepidoptera male genitalia, a specialized row of armament ...
corona ciliata
see ciliary loop.
corona radiata
(NEMATODA: Secernentea) In Strongylida, a series of leaf-like or fringe-like structures encircling/bordering the labial region; the internal and external or outer leaf ...
coronal
adj. [L. corona, crown] (PORIFERA) Referring to being located on the rim of an oscule.
coronal branch
(ARTHROPODA: Insecta) A longitudinal suture occurring along the midline of the vertex, between the compound eyes; the stem of the Y-shaped epicranial suture; the metopic ...
coronal disc
(ROTIFERA) The ciliary wreath on the anterior part of the head region.
coronal suture
См. coronal branch.
coronal system
(ECHINODERMATA: Echinoidea) In sea urchins, plates forming the wall of the test.
coronary
adj. [L. corona, crown] Crown-shaped or crownlike; encircling.
coronate
adj. [L. corona, crown] Having a crown, corona or similar structure.
coronate egg
(ARTHROPODA: Insecta) An egg with the upper end surrounded by a circlet of spines or comparable structures.
coronet
n. [L. dim. corona, crown] A small or inferior corona or crown.
corpora
pl. of corpus.
corpora allata
pl.; sing. corpus allatum (ARTHROPODA: Insecta) Specialized endocrine glands, usually a pair of glandular bodies (may be fused to a single median organ) behind and linked ...
corpora cardiaca
pl.; sing. corpus cardiacum (ARTHROPODA: Insecta) Paired specialized endocrine glands, closely associated with the aorta and forming part of its wall and behind the brain, ...
corpora incerta
see corpora allata.
corpora optica
pl.; sing. corprus opticum (ARTHROPODA: Insecta) A pair of small bodies lying above the pons cerebralis in the dorsal part of the brain, connected with the glomeruli of the ...
corpora pedunculata
pl; sing. corprus pedunculatum (ARTHROPODA: Insecta) The pedunculate or mushroom bodies of the protocerebrum, said to have an important role in visual integration in ...
corpora ventralia
pl.; sing. corprus ventralium (ARTHROPODA: Insecta) Ventral or lateral bodies that lie ventrolaterally in the protocerebrum just above the antennal glomeruli of the ...
corpotentorium
n. [L. corpus, body; tentorium, tent] (ARTHROPODA: Insecta) Fusion of the anterior and posterior tentorial arms; the body of the tentorium.
corpus
n.; pl. corpora [L. corpus, body] 1. A body or structure. 2. (ARTHROPODA: Insecta) a. The body. b. In many Collembola, the basal part of the minute pair of appendages on ...
corpus adiposum
The fat-body.
corpus centrale
(ARTHROPODA: Insecta) The central "body" of a brain, anterior or ventral to the pons cerebralis.
corpus esophagi
see corpus.
corpus luteum
(ARTHROPODA: Insecta) The mass of degenerating follicle epithelium left in an egg chamber after discharge of the egg, that sometimes persists and becomes compressed to form ...
corpus mandibulae
(ARTHROPODA: Insecta) The mandibular body.
corpus scolopale
see scolopale.
corpuscle
n. [L. dim. corpus, body] A small cell floating freely in a fluid such as blood or lymph or embedded in an intercellular matrix.
corpuscular
adj. [L. dim. corpus, body] Pertaining to the nature of or composed of corpuscles or particles.
correlated characters
Features or qualities associated either as manifestations of a well-integrated ancestral gene complex, or because they are functionally correlated.
correlated response
A change in one character (phenotype) occurring as an incidental consequence of selection for a seemingly independent character, such as reduced fertility resulting from ...
correlation
n. [LL. correlatio, relationship] 1. The act or process of correlating. 2. The degree to which statistical variables measure the association of two or more variables. a. ...
corridor
n. [L. currere, to run] A gallery or passageway made by an animal.
corrode
v. [L. corrodere, to gnaw to pieces] To consume or wear away.
corrugate
adj. [L. corrugare, to wrinkle] Wrinkled; contracted into alternate ridges and furrows.
corselet
see prothorax.
cortex
n.; pl. cortices [L. cortex, bark] 1. The outermost covering layer of a structure. cortical adj.. 2. (PORIFERA) The ectosome when thick and gelatinous or fibrous, or packed ...
cortical layer
1. (ARTHROPODA: Insecta) A region at the surface of the egg devoid of yolk. 2. (NEMATA) see epicuticle, exocuticle, mesocuticle, endocuticle.
corticate
adj. [L. cortex, bark] Having a special cortex, or external layer.
corticiform
adj. [L. cortex, bark; forma, shape] Sculptured or textured like bark.
corticolous
adj. [L. cortex, bark; colere, to dwell] Living in or on the bark of plants.
coruscant
adj. [L. coruscare, to flash] Rapid intermittent flashing or gleaming, as of fireflies.
corvinus
adj. [L. corvus, crow] Deep, shining black.
coryogamy
see koriogamy.
corypha
n.; pl. coryphae [Gr. koryphe, top] (ARTHROPODA: Insecta) That region of certain scarabaeoid larvae, between the epipharynx and the clithra, sometimes bearing setae; often ...
corysterium
n. [Gr. korys, helmet] (ARTHROPODA: Insecta) In certain females, an abdominal glandular structure that functions in secreting the glutinous egg covering.
cosmiotaxy
n. [Gr. kosmios, well ordered; taxis, arrangement] Secondary formation of recognizable and simple organs.
cosmiotrichy
n. [Gr. kosmios, well ordered; thrix, hair] Setal cosmiotaxy.
cosmopolitan
adj. [Gr. kosmos, world; polites, citizen] Worldwide in distribution; ecumenical; pandemic.
cosmopolite
n. [Gr. kosmos, world; polites, citizen] A plant or animal occurring in most parts of the world.
cosmotropical
adj. [Gr. kosmos, world; tropikos, of turning] Occurring throughout most of the tropics.
costa
n.; pl. costae [L. costa, rib] 1. Any rib-like structure. 2. (ARTHROPODA: Crustacea) Any thickened portion of the peniferum of ostracods. 3. (ARTHROPODA: Insecta) a. The ...
costal area
(ARTHROPODA: Insecta) That portion of a wing immediately behind the leading edge (anterior or front margin).
costal brace
(ARTHROPODA: Insecta) The thick veinlet at the base of the wing of mayflies, that runs from the costa to the radius.
costal break
(ARTHROPODA: Insecta) A point on the costa of a wing where the sclerotization is weak or lacking, or the vein appears to be broken.
costal cell
(ARTHROPODA: Insecta) The space of the wing between the costa and the subcostal vein.
costal cross veins
(ARTHROPODA: Insecta) In wings with numerous veins, those that extend between the costa and the subcosta.
costal field
(ARTHROPODA: Insecta) That area of the fore wing of Orthoptera adjacent to the anterior margin or costa; the anterior field.
costal fold
(ARTHROPODA: Insecta) An eversible fold in the fore wing near the costa of certain hesperioid butterflies that contains brushes of modified scales that function to disperse ...
costal hinge
(ARTHROPODA: Insecta) The nodal furrow.
costal margin
(ARTHROPODA: Insecta) The leading edge of a wing; see anal margin, apical margin.
costal membrane
(ARTHROPODA: Insecta) In Hymenoptera, the surface of the wing in front of the costal vein.
costal nervure
(ARTHROPODA: Insecta) The costa.
costal region
(ARTHROPODA: Insecta) The upper area of a wing near the costa.
costal sclerite
(ARTHROPODA: Insecta) In wings, a sclerite at the base of the costa.
costal shield
(BRYOZOA: Gymnolaemata) The discontinuous frontal shield or part of the frontal shield of cheilostomate zooids, produced by intermittently fused or unfused spines ...
costal spines
(ARTHROPODA: Insecta) In generalized Lepidoptera, a tuft of slightly curved spine-like setae on the costa of the hind wing near the base, that functions in holding the wings ...
costal vein
(ARTHROPODA: Insecta) The subcosta of Lepidoptera.
costalia
see costa.
costate
adj. [L. costa, rib] Having a longitudinal rib or ribs; having costae.
costella
n.; pl. costellae [L. dim. costa, rib] 1. A small costa or rudimentary rib. 2. (MOLLUSCA: Bivalvia) A narrow, linear elevation of the shell surface.
costellate
adj. [L. dim. costa, rib] Bearing costellae.
costiform
adj. [L. costa, rib; forma, shape] Shaped like a costa or raised rib.
costoradial
adj. [L. costa, rib; radius, ray] (ARTHROPODA: Insecta) Of or pertaining to the radius and the costa of the wing.
costula
n.; pl. costulae [L. dim. costa, rib] 1. (ARTHROPODA: Insecta) In Hymenoptera, a small ridge that separates the externo-median metathoracic area into two parts. 2. ...
costulate
adj. [L. dim. costa, rib] Being less prominently ribbed than costate.
coterminous
see conterminous.
cotyla
См. cotyle.
cotyle
n. [Gr. kotyle, a cup] A cuplike cavity or organ; an acetabulum.
cotyliform
См. cotyloid.
cotylocercous cercariae
(PLATYHELMINTHES: Trematoda) Larval marine trematodes with tails that are broad, short, with cupshaped suckers, functioning as adhesive organs.
cotylocidium
n. [Gr. kotyle, cup; L. caedere, to cut] (PLATYHELMINTHES: Trematoda) Larvae of Aspidogastridea with tufts of cilia for swimming and a posterior ventral sucker without ...
cotyloid
adj. [Gr. kotyle, a cup; L. forma, shape] Cup-shaped.
cotyloid cavity
(ARTHROPODA: Insecta) The acetabulum or coxal cavity.
cotype
Formerly used for syntype or paratype.
counterevolution
n. [L. contra, against; evolutus, unrolled] Development of traits in a population in response to exploitation, competition, or other detrimental interaction with another ...
countershading
n. [L. contra, against; A.S. sceadu, shade] In camouflaging, an animal being dark dorsally and pale ventrally and therefore appearing evenly colored and inconspicuous.
coupling
n. [L. copulare, to join] Bringing or coming together; linking; specifically sexual union.
court
n. [L. cohors, enclosed space] (ARTHROPODA: Insecta) In bees, an assemblage of workers that form a circle around a queen, antennating, licking and sometimes feeding her. ...
courtship
n. The behaviour pattern in animals prior to copulation between members of the same species, different sexes, that facilitates a receptive condition.
covariation
n. [L. con, with; varius, diverse] Coincident variation; correlation.
cowled
adj. [L. cucullus, hood] Shaped like a hood; hooded.
coxa
n.; pl. -ae [L. coxa, hip] (ARTHROPODA) 1. The first or proximal segment of a leg that articulates basally with the wall of the thorax. 2. In Crustacea, the segment of an ...
coxa genuina
see coxa vera.
coxa rotatoria
(ARTHROPODA: Insecta) A coxa with a monocondylic joint; having a single condyle.
coxa scrobiculata
(ARTHROPODA) A coxa with a dicondylic joint; having two points of articulation.
coxa vera
(ARTHROPODA: Insecta) The anterior portion of the mesoand metathoracic coxae; the coxa genuina.
coxacava
see coxal cavity.
coxal bridge
(ARTHROPODA: Insecta) The attachment structure between the sternum and pleuron; the pre- and post-coxal bridges.
coxal cavity
(ARTHROPODA: Insecta) The cavity in which the coxa articulates; an acetabulum; coxacava.
coxal corium
(ARTHROPODA: Insecta) The articular membrane encircling the base of a coxa.
coxal endite
(ARTHROPODA: Crustacea) A lobe issuing from the inner margin of the coxa.
coxal epipodites
(ARTHROPODA: Insecta) The small pairs of unjointed styli on the coxae of the legs.
coxal exite
(ARTHROPODA: Crustacea) A lobe issuing from the outer margin of the coxa; coxepipod.
coxal file
(ARTHROPODA: Insecta) A series of ridges on the coxa of the middle legs that by rubbing with a scraper on the trochanter of the hind leg produce sounds; a stridulatory ...
coxal glands
1. (ARTHROPODA: Chelicerata) The excretory organs of arachnids; in Araneae, located opposite the coxae of the first and third legs, that function in collecting wastes into a ...
coxal lobe
(ARTHROPODA: Insecta) In certain larvae, a triangular abdominal area extending from the hypopleurum toward the meson of the sternum.
coxal plate
Plate-like expansions or dilatations of the coxa.
coxal process
(ARTHROPODA: Insecta) A structure of the pleuron, with which the coxa articulates at the ventral extremity of the pleural suture.
coxal sacs
(ARTHROPODA: Diplopoda) Eversible thin-walled sacs in the coxae of the legs.
coxal stridulatory organ
(ARTHROPODA: Insecta) In Hemiptera, longitudinal striations of the coxal base and the cephalic margin of the lateral plate of the coxal cavity.
coxal stylets
(ARTHROPODA: Insecta) The coxal epipodites.
coxal vesicle
(ARTHROPODA: Insecta) In Collembola, the basal part of the ventral tube, believed to represent the fused coxae of the segmental appendages and the vesicles.
coxepipod(ite)
see coxal exite.
coxifer
n. [L. coxa, hip; ferre, to bear] (ARTHROPODA: Insecta) The pleural pivot of the coxa.
coxite
n. [L. dim. coxa, hip] 1. The basal segment of certain abdominal appendages. 2. (ARTHROPODA: Crustacea) see protopod( ite). 3. (ARTHROPODA: Insecta) In male Thysanura ...
coxocerite
n. [L. coxa, hip; Gr. keras, horn] (ARTHROPODA: Insecta) The proximal or basal segment of an antenna.
coxomarginale
see basicoxite.
coxomeres
n. pl. [L. coxa, hip; meros, part] (ARTHROPODA: Diplopoda) The three segments of the mandible.
coxopleure
see episternum.
coxopleurite
n. [L. coxa, hip; Gr. pleura, side] (ARTHROPODA: Insecta) A sclerite of the thoracic pleuron, that articulates with the dorsal margin of the coxa; in lower pteryotic ...
coxopod(ite)
n. [L. coxa, hip; Gr. pous, foot] (ARTHROPODA) The basal or first segment of an appendage; a coxa.
coxosternal
adj. [L. coxa, hip; Gr. sternon, chest] (ARTHROPODA: Insecta) Of or pertaining to the coxosternum.
coxosternal plate
(ARTHROPODA: Insecta) In Thysanura, the fused coxites and sternum of each segment.
coxosternite
adj. [L. coxa, hip; Gr. sternon, chest] The coxite; pleurosternite.
coxosternum
n. [L. coxa, hip; Gr. sternon, chest] (ARTHROPODA: Insecta) The abdominal sternum; a plate of compound origin that includes the areas of the limb bases; pleurosternum. ...
coxotrochanteral joint
(ARTHROPODA) One of the two primary bendings of a typical arthropod leg; pertaining to the joining of the coxa and the trochanter; see femorotibial joint.
craniad
adv. [Gr. kranion, skull; L. ad, toward] Toward the head or anterior end.
cranium
n.; pl. -niums [Gr. kranion, skull] The sclerotic, skulllike part of the head capsule. cranial adj..
craspedon
n.; pl. craspeda [Gr. kraspedon, edge] 1. (CNIDARIA: Hydrozoa) Those possessing a velum. 2. (PLATYHELMINTHES: Cestoda) Those with segments that overlap.
craspedote
adj. [Gr. kraspedon, edge] 1. Having a velum. 2. (PLATYHELMINTHES: Cestoda) Having the anterior proglottid overlapping the next posterior one.
crassa
n.; pl. crassae [L. crassus, thick] (ARTHROPODA: Insecta) The mandibular apodemes.
crassus
adj. [L. crassus, thick] Coarse, thick or tumid in structure.
crateriform
adj. [L. crater, bowl; forma, shape] Having the form of a saucer or hollow, shallow bowl; pertaining to a crater or funnel.

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