Chlorogogue see chloragogen cells

chlorophyll n. [Gr. chloros, yellow-green; phyllon, leaf] The green pigment of plants and certain protozoa and bacteria, involved in photosynthesis.

choana n.; pl. -ae [Gr. choane, funnel] Funnel-shaped.

choanocyte n. [Gr. choane, funnel; kytos, container] (PORIF) A flagellate cell crowned by a collar of cytoplasmic tentacles that generates currents of water; a collar cell.

choanocyte chamber (PORIF) A cavity enclosed by a group of choanocytes.

choanoderm n. [Gr. choane, funnel; derma, skin] (PORIF) Any surface that is lined by choanocytes.

choanosome n. [Gr. choane, funnel; soma, body] (PORIF) That area of the body that houses choanocyte chambers.

chondrioconts [Gr. chondros, grain; kontos, punting pole] Tubular and vesicular interior structures of mitochondria.

chondriodieresis n. [Gr. chondros, grain; dieres, double] Alterations in mitochondria during cell division.

chondriokinesis n. [Gr. chondros, grain; kinesis, movement] Reproduction of mitochondria and their distribution in mitosis and meiosis.

chondriolysis n. [Gr. chondros, grain; lysein, to loosen] The disintegration of mitochondria.

chondriome, chondrioma n. [Gr. chondros, grain; -ome, group] The total mitochondrion content of a cell.

chondriosome n. [Gr. chondros, grain; soma, body] The mitochondria.

chondrocyst n. [Gr. chondros, grain; kystis, bladder] (PLATY: Turbellaria) Rhabdite of somewhat granular texture in land planarians.

chondroid a. [Gr. chondros, cartilage; eidos, shape] Resembling cartilage.

chondrophore n. [Gr. chondros, cartilage; pherein, to bear] 1. (CNID: Hydrozoa) A disc-like colony of floating hydroids of the order Chondrophora; a chrondrophoran. 2. (MOLL: Bi-valvia) A pit or large spoon-shaped form projecting from the hinge plate; support for the inner hinge cartilage.

chone n. [Gr. choane, funnel] (PORIF) A canal that penetrates the cortex into which the dermal pores generally open.

chord, chorda n. [L. chorda, string] A cord, nerve or filament. chordal a.

chord of the wing (ARTHRO: Insecta) The straight line joining the leading and trailing edges of a wing.

chordotonal organ Subcuticular sense organs of insects and perhaps nematodes that consist of one to several hundred chordotonal sensilla (scolopidia); attached to the cuticle that function as mechanoreceptors; abundant in tympanal organs; a scolopophorus organ. see tympanal organ, myochordotonal organ.

chore n. [Gr. choros, place] An area in which geographical or environmental conditions are in harmony. see biochore, biotype.

chorion n. [Gr. chorion, membrane enclosing the fetus] The outermost shell or membranous covering of the egg of various invertebrates.

choriothete n. [Gr. chorion, membrane enclosing the fetus; thete, servant] (ARTHRO: Insecta) A muscular structure of cyclical development that adheres to the chorion of the egg of Glossina and the Pupipara , and by the actions of the muscles aids in the removal of the chorion.

chorology n. [Gr. choros, place; logos, discourse] The science dealing with the geographical distribution of organisms; zoogeography.

choronomic a. [Gr. choros, place; nomos, place or condition for living] The external influences effecting animals, such as geographical or regional environment. see autonomic.

chorotype n. [Gr. choros, place; typos, type] A local type.

chroma n. [Gr. chroma, color] The hue and saturation of a color, i.e., red, green, brown, etc., as opposed to black, white and gray.

chromaffin a. [Gr. chroma, color; L. affinis, related to] Staining strongly with chromium salts; also called chromophil; chromophile.

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