Online Dictionary of Invertebrate Zoology: Complete Work - Best Text

Online Dictionary of Invertebrate Zoology 497polymorph without an orificial wall or equivalent, lophophore,alimentary canal, and usually muscles.kentrogon n. [Gr. kentor, piercer; gone, that which generates](ARTHRO: Crustacea) In Rhizocephala, undifferentiated cellsformed after the cyprid larval molts and its appendagesand carapace are discarded, that penetrates the integumentof a Decapoda host.kentromorphism n. [Gr. kentor, piercer; morphe, form] (AR-THRO: Insecta) A change brought about by environmentalstimuli (high or low population density) in phasmatids, locusts,the larva of Lepidoptera and a few other insects, thatcause coloration and pattern differences, anatomical proportions,physiology and behavioral differences. see gregaria,solitaria.kentron n. [Gr. kentor, piercer] (ARTHRO: Crustacea) In Rhizocephala,a hollow stylet in the anterior body of a kentrogonthat invades the antennule and pierces the integument ofits host.keratin n. [Gr. keras, horn] A sulfur-containing nitrogenouscompound found in animal tissues such as horn, hair andnails.keratinization n. [Gr. keras, horn] Conversion of tissues intokeratin or keratin-like tissue. see cornification.keratose a. [Gr. keras, horn] Having horny fibers in theskeletal structure, as in certain Porifera.kermes (Generic name) A red dye made from the dried bodiesof female coccids of kermococcus ilicis; granum tinctorium.key n. [ME. key] A tabulation of diagnostic characters of organismsmost often in dichotomous couplets facilitatingrapid identification.kidney shaped Shaped like a kidney; reniform.kinaesthesis, kinesthesis n. [Gr. kinein, to move; aisthesis,perception] Perception of movement by internal stimulation;proprioceptors.kinase n. [Gr. kinein, to move; -asis, enzyme] Enzymes thatcatalyse the transfer of high energy groups from a donor toan acceptor; named for acceptor; enzyme which activates a