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Online Dictionary of Invertebrate Zoology: Complete Work - Best Text

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> 643osculant a. [L. osculare, to kiss] 1. Adhering closely. 2. A connectinglink between two groups; having intermediatecharacters, as in genera and species.oscular chimney see osculumosculum, oscule n.; pl. -la [L. dim. os, mouth] 1. (PORIF) Acomparatively large exhalant aperture; an oscular chimney.see apopore. 2. (PLATY: Cestoda) A sucker.osmeterium n.; pl. osmeteria [Gr. osme, odor] (ARTHRO: Insecta)A fleshy, tubular, eversible pouch usually V or Y-shaped, sometimes arising from cephalo- dorso-meson <strong>of</strong>the prothorax <strong>of</strong> Papilionidae caterpillars, that produce apenetrating odor; also appearing elsewhere in the bodies <strong>of</strong>other forms.osmiophilic, osmophilic a. [Gr. osme, smell; philein, to love]Staining readily with osmic acid.osmium see osmosiumosmoconformer n. [Gr. osmos, pushing; cum, with; forma,shape] An organism having the salt content <strong>of</strong> the blooddetermined by that <strong>of</strong> the surrounding sea water.osmomorphosis n. [Gr. osmos, pushing; morphos, form]Change in shape due to osmotic (salt) changes in the environment.osmoreceptors n.pl. [Gr. osmos, pushing; recipere, to receive]Receptors that sense changes in osmotic pressure.osmoregulation n. [Gr. osmos, pushing; L. regulatus, regulated]Maintaining the osmotic pressure in the body byregulating the amount <strong>of</strong> water and salts, effected by theremoval <strong>of</strong> salts, excretory products or water by the excretoryorgans.osmosis n. [Gr. osmos, pushing] Passage <strong>of</strong> water through asemi-permeable membrane from a solution <strong>of</strong> lower concentrationto one <strong>of</strong> higher concentration until the solutionsare equal in concentration.osmosium n. [Gr. osmos, pushing] (NEMATA) A structure <strong>of</strong>modified intestinal tissue that protrudes into the tissue <strong>of</strong>the Demanian organ that is <strong>of</strong> gonadal origin.osmotaxis n. [Gr. osmos, pushing; taxis, arrangement] A re-

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