space between two ribs, costae, or costellae of the con-chostracan carapace.
conchostracan carapace ribs (ARTHRO: Crustacea) Strong radial ridges with intervals of variable width radiating from and across the umbo, usually nodose at intersections of growth lines.
conchula n. [L. concha, shell] (CNID: Anthozoa) A modified si-phonoglyph of certain sea anemones that is provided at the oral end with a spout-like lip.
conchyliomorphite n. [L. concha, shell; Gr. morphe, form] A fossil imprint of a shell.
concinate a. [L. concinnus, well-arranged] Neat; elegant.
concolor a. [L. concolor, colored uniformly] 1. Of uniform color. 2. (ARTHRO: Insecta) Having the upper and lower surfaces of Lepidoptera with the same coloring.
concrescence n. [L. cum, together; crescere, to grow] The growing together of parts; joining; coalescing; the union of parts originally separated.
concretion n. [L. cum, together; crescere, to grow] A massing together of parts or particles.
concurrent a. [L. cum, together; currere, run] Meeting or coming together; acting in conjunction, as a joint or vein.
condensation n. [L. cum, together; densare, to thicken] 1. The act or process of condensing. 2. Descendents passing through the ancestral part of ontogeny faster than their ancestors did during phylogeny; it may occur by deletion of steps or accelerated development.
conditioned reflex The habitual response in the nervous system arising from a particular outside stimulus.
conditioning n. [L. conditio, agreement, state] The process of acquisition by an animal of the capacity to respond to a new stimulus by associating the new stimulus with an old one.
conduction n. [L. conducere, to lead together] The movement of heat, sound waves, or nerve impulses through an organism's cells or tissues.
conductivity n. [L. conducere, to lead together] The ability to transmit an impulse.
conductor n. [L. conducere, to lead together] A structure specialized for the transmission of excitation.
conduplicate a. [L. cum, together; duplicare, to double] Doubled or folded together; folded together lengthwise.
condyle n. [Gr. kondylos, knuckle] 1. A knoblike process that forms the fulcrum for joint movement. 2. (ARTHRO) The surfaces between arthropod joints, that provide the fulcra on which the joints move. 3. (BRYO: Gymnolaemata) In some cheilostomates, one of a pair of bilateral skeletal protruberances on which the operculum of an autozooid or mandible of an avicularium is hinged; in asymmetrical avi-cularia can be single. 4. (MOLL: Bivalvia) An enlarged prominent end of a shell. condylar, condylic, condyloid a.
cone n. [L. conus, cone] 1. Any cone-shaped structure. 2. The conical crystalline body of a compound eye, not always solid crystalline and occasionally not conical. see crystalline. 3. (ARTHRO: Insecta) The head shape of a thrip. 4. (NEMATA: Secernentea) The vulval cone of heteroderid cysts.
cone cell (ARTHRO: Insecta) One of the four cells that produce the crystalline cone.
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