cuticulin n. [L. cuticula, skin] (ARTHRO: Insecta) A compound material of uncertain chemical nature that forms the epicu-ticle.
cuticulin layer 1. (ARTHRO: Chelicerata) In mites, the epio-stracum. 2. (ARTHRO: Insecta) Layer extending over the surface of the body and over cuticular projections such as bristles and scales as well as epidermal invaginations.
cuttle bone (MOLL: Cephalopoda) The internal calcified shell remnant of cuttlefish.
Cuvierian organs (ECHINOD: Holothuroidea) A few, or a tuft of long blind tubules extending from the base of the respiratory trees to the anus; ejected as sticky filaments to entangle possible predators; sometimes called 'cotton spinners'.
cyaneous a. [Gr. kyaneos, dark-blue] Dark blue.
cyanescent a. [Gr. kyaneos, dark-blue; L. escens, become] Having a deep bluish tinge or shading; cerulean.
cyanoblast n. [Gr. kyaneos, dark-blue; blastos, bud] The immature stage of a cyanocyte (hemocyte) that contains polyribosomes, cisternae often filled with dense granular material, small Golgi apparatus and mitochondria; reported to be typical of an active protein-synthesizing and storing cell.
cyanocyte n. [Gr. kyaneos, dark-blue; kytos, container] A hemocyte that breaks down and releases hemocyanin into the hemolymph. see cyanoblast.
cyanogenic a. [Gr. kyaneos, dark-blue; gennaein, to produce] 1. Production of the blue color. 2. Used to describe pungent and irritating vapors emitted by certain arthropods.
cyanophilous a. [Gr. kyaneos, dark-blue; philos, loving] Showing a special affinity for blue or green stains.
cyathiform a. [L. cyathus, cup; forma, shape] Cup-shaped; cupuliform; a little widened at the top.
cyathotheca n. [Gr. cyathus, cup; theke, case] (ARTHRO: In-secta) The cover of the thorax of a pupa.
cybernetics n. [Gr. kybernetikos, good at steering] Science of the processes of communication and control in an animal.
cycle n. [Gr. kyklos, circle] A circle; circular; arranged in a circle; to pass through a cycle of changes. cyclic a.
cyclocoele n. [Gr. kyklos, circle; koilos, hollow] (PLATY: Tre-matoda) That area of the intestinal cecae that end blindly or are fused posteriorly.
cyclocoelic a. [Gr. kyklos, circle; koilos, hollow] Having the intestine spirally coiled.
cyclodont n. [Gr. kyklos, circle; odons, tooth] (MOLL: Bivalvia) Dentition curving out from under the umbones and twisted into line in the cardinal margin, as in Cardiinae.
cyclogeny n. [Gr. kyklos, circle; genes, producing] The production of a series of different morphological types in a life cycle.
cyclolabia n. [Gr. kyklos, circle; L. labium, lip] (ARTHRO: In-secta) The short forceps of certain earwigs that are of variable lengths in the same species.
cyclomorphosis n. [Gr. kyklos, circle; morphe, form] A seasonal nongenetic change of phenotype in marine zooplankton, as certain cladocerans and rotifers.
cyclopean, cyclopic a. [Gr. kyklos, circle; ops, eye] A single median eye developed under certain artificial conditions, or a mutation in place of the normal pair.
cyclopoid larva (ARTHRO: Insecta) The larva of proctotrupoid Hymenoptera with a hypermetamorphosis, characterized by a swollen cephalothorax, large sickle-like mandibles and a pair of bifurcate processes of various forms.
cyclops stage (ARTHRO: Crustacea) Post-metanaupliar stage of a copepod.
cyclosystem n. [Gr. kyklios, circular; systema, placed together] (CNID: Hydrozoa) In milleporinan medusae, consisting of several dactylopores surrounding a central gastropore.
cydariform a. [L. cydarum, kind of ship; forma, shape] Globose or orbicular, but truncated at opposite ends.
cydippid larva (CTENO) A larva with developmental stages resembling adult cydippids, and thus may be larval stages of other orders.
cylindraceous a. [Gr. kylindros, cylinder] Pertaining to or like a cylinder.
cylindrical a. [Gr. kylindros, cylinder] Round, cylinder-like with parallel sides.
cylindroconic a. [Gr. kylindros, cylinder; konos, cone] Having the shape of a cylinder terminating in a cone.
cymba n. [Gr. kymbe, small boat] (PORIF) A spicule shaped like a boat.
cymbium n. [Gr. kymbe, small boat] (ARTHRO: Chelicerata) The boat-shaped tarsus of the copulatory pedipalpus in certain spiders. see paracymbium.
cymbiform a. [Gr. kymbe, small boat; L. forma, shape] Boat-shaped; navicular; scaphoid.
cymose a. [L. cyma, young shoot] (CNID: Hydrozoa) Pertaining to the budding zone that continues to bud and form branches.
cynopodous a. [Gr. kyon, dog; pous, foot] Having non-retractile claws.
cyphonaute larva pl. -nautae (BRYO: Gymnolaemata) A free-
swimming larva with a triangular profile and strongly compressed laterally; most of the body is enclosed by a bivalve shell.
cyphopod n. [Gr. kyphos, bent; pous, foot] (ARTHRO: Diplo-poda) In Julidae, large, sclerotized bases of aborted appendages behind the second pair of legs.
cyphosomatic a. [Gr. kyphos, bent; soma, body] (ARTHRO: Insecta) Pertaining to larvae with the dorsal surface curved and the ventral surface straight or flat.
cypraeiform a. [L. Cypris, Venus; forma, shape] Oval, rolled inward from each side.
cyprid n. [L. Cypris, Venus] (ARTHRO: Crustacea) In some rhizocephalan barnacles, larval stage after cypris and before kentrogon.
cypris n. [L. Cypris, Venus] (ARTHRO: Crustacea) In bivalve barnacles, the nonfeeding larval stage prior to metamorphosis into the cyprid, kentrogon and adult stage, so named because of its resemblance to the ostracod genus Cypris.
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