calicoblastic epithelium (CNID: Anthozoa) A specialized portion of the ectoderm of corals that produces the aragonite skeleton in the true or stony corals.
caliology n. [Gr. kalia, hut; logos, discourse] The study of dwellings or natural shelters utilized by animals.
callosity n.; pl. -ties [L. callus, hard skin] 1. A state or quality of being callous. 2. (MOLL: Gastropoda) The local thickened part of the callus or inductura of the shell.
callous a. [L. callus, hard skin] Hardened; having a callus or callosities.
callow worker (ARTHRO: Insecta) A newly emerged adult worker ant whose exoskeleton is still relatively soft and lightly pigmented. see teneral.
callum n. [L. callus, hard skin] (MOLL: Bivalvia) A sheet of shelly material filling in the anterior gape in the shell of certain adult mollusks.
callus n.; pl. calluses, calli [L. callus, hard skin] 1. An unusually hardened or thickened area; a rounded swelling. 2. (ARTHRO: Insecta) In brachycerous Diptera, a knoblike swelling on the cuticle. 3. (MOLL: Gastropoda) A shelly substance (inductura) on the parietal region or extending from the inner lip over base or into the umbilicus of the shell.
calobiosis n. [Gr. kalos, beautiful; biosis, manner of life] A form of symbiosis in which a species lives in the nest of, and at the expense of another either temporarily or permanently.
calomus n. [Gr. kalamos, stalk, reed] (NEMATA) The shaft of the spicule between the manubrium and the lamina; sometimes called the spicule shaft.
caloric a. [L. calor, heat] Of or pertaining to heat.
calorigenic a. [L. calor, heat; genere, to produce] Generating heat.
calorimetry n. [L. calor, heat; metricus, of measuring] The measurement of heat exchange in an organism or in a system.
calotte n. [F. calotte, skull cap] 1. (MESO: Rhombozoa) The headlike region of dicyemids. 2. (NEMATOM) Anterior ex tremity of a nematomorph, often marked by a white area followed by a darkened band.
calthrop n. [ML. calcitrapa, a four-pointed weapon used to obstruct enemy movements] (PORIF) A tetraxon spicule with four rays more or less equal.
caltrop spines (ARTHRO: Insecta) In Lepidoptera, specialized tibial spurs of limacodid larvae.
calva n. [L. calvaria, skull] A skull-cap; an epicranium.
calvarium n. [L. calvaria, skull] (NEMATA) Subcuticular cephalic framework.
calvous a. [L. calvus, bald] Lacking hair; bald.
calx n.; pl. calces [L. calx, heel] 1. A heel, or the portion of a limb corresponding to the heel. 2. (ARTHRO: Insecta) The distal end of the tibia.
calyciform a. [Gr. kalyx, cup; L. forma, shape] Calyx-like or goblet-shaped.
calycine a. [Gr. kalyx, cup] Cuplike; calyx-like.
calycle n. [Gr. kalyx, cup] 1. (ARTHRO: Crustacea) A small cap on the umbones. 2. (CNID: Hydrozoa) The theca of hy-droids.
calyculate a. [Gr. dim. kalyx, cup] (ARTHRO) Pertaining to antennae furnished with cup-shaped joints for insertion of next annulus.
calyculus n.; pl. -li [Gr. dim. kalyx, cup] 1. Any cup-shaped structure; calycle. 2. (CNID: Hydrozoa) A cavity of a coral containing the polyps.
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