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Online Dictionary of Invertebrate Zoology: Complete Work - Best Text

Online Dictionary of Invertebrate Zoology: Complete Work - Best Text

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<strong>Online</strong> <strong>Dictionary</strong> <strong>of</strong> <strong>Invertebrate</strong> <strong>Zoology</strong> 273or dart <strong>of</strong> certain snails.dart sac (MOLL: Gastropoda) A muscular caecum <strong>of</strong> the vaginathat produces a fine-pointed calcareous shaft that is 'shot'by partners before courtship, lodging in the integument andreleasing a stimulus for courtship behavior.Darwinism n. [C. Darwin, English naturalist] The theory <strong>of</strong>species origin through natural selection working on smallinherited differences in individuals.dauer larvae (NEMATA) A quiescent stage entered by someparasitic larvae while enclosed in the cast cuticle <strong>of</strong> theprevious stage.dauermodification n. [Ger. dauer, duration; L. modificare, toregulate] Character change usually induced by extreme environmentalfactors that survives for several generations.daughter n. [A.S. dohter, daughter] The <strong>of</strong>fspring <strong>of</strong> a division,not implying sex, such as in daughter cells or daughternucleus; a daughter chromosome applies to chromatidsafter metaphase.daughter cells The two cells resulting from division <strong>of</strong> a singlecell.daughter cyst (PLATY: Cestoda) Fluid filled bladder with protoscolescesformed by exogenous budding <strong>of</strong> the germinalepithelium <strong>of</strong> a unilocular hydatid cyst.day-eye (ARTHRO: Insecta) The apposition eyes adapted foruse in daytime when light is abundant.dealate, -ated a. [L. de, away from; alatus, winged] (ARTHRO:Insecta) Loosing wings, as ants and termites, by casting orbreaking <strong>of</strong>f. dealation n.death n. [A.S. death, death] Irreversible cessation <strong>of</strong> the activitiesand breakdown <strong>of</strong> the structure <strong>of</strong> protoplasm.deaurate a. [L. de, away from; auratus, golden] Having a goldcolor that appears rubbed or worn.decacanth n. [Gr. deka, ten; akantha, thorn] (PLATY: Cestoda)A ten-hooked larva that hatches from the egg; a lycophore.decalcification n. [L. de, away from; calcarius, <strong>of</strong> lime; ficare,to make] Loss <strong>of</strong> calcium salts from living tissues; removingcalcium salts from tissues with acids.

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