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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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450Maggenti and Gardnerhybrid n. [L. hybrida, a crossbred animal] The <strong>of</strong>fspring <strong>of</strong> tw<strong>of</strong>orms or species that are genetically dissimilar; a heterozygote.see cross.hybridization n. [L. hybrida, a crossbred animal] The crossing<strong>of</strong> individuals belonging to two unlike natural populations,or to different species.hybrid vigour see heterosishydatid cyst (PLATY: Cestoda) Metacestode <strong>of</strong> Echinococcus,with many protoscolices, some budding inside secondarybrood cysts.hydatid sand (PLATY: Cestoda) Free protoscolices forming thesediment in a hydatid cyst.hydranth n. [Gr. hydor, water; anthos, flower] (CNID: Hydrozoa)A nutritive zooid in a colony; the hydroid polyp, bearinga mouth, digestive cavity and tentacles.hydrarch a. [Gr. hydor, water; arche, beginning] A series <strong>of</strong>changes in time from newly formed pond or lake to landwith climax vegetation; an ecological succession.hydra-tuba n. [Gr. hydor, water; tuba, horn] (CNID: Scyphozoa)A simple polyp-like stage that may produce a fewmore polyps, but all bud <strong>of</strong>f larvae known as ephyrae,which bud like a hydra. see scyphistoma.hydrelatic a. [Gr. hydor, water; elaunein, to set in motion] Ofor pertaining to the effects stimulation <strong>of</strong> glands have onactive transport <strong>of</strong> inorganic solutes and water.hydric a. [Gr. hydor, water] 1. Having an abundant supply <strong>of</strong>moisture. 2. Pertaining to or containing hydrogen.hydrobiology n. [Gr. hydor, water; bios, life; logos, discourse]Study <strong>of</strong> aquatic plants and animals.hydrobiont n. [Gr. hydor, water; bion, living] An organismthat lives mainly in water.hydrocarbon n. [Gr. hydor, water; L. carbo, coal] A chemicalcompound <strong>of</strong> hydrogen and carbon, usually in the proportion<strong>of</strong> C-H 20 .hydrocaulus n.; pl. -cauli [Gr. hydor, water; kaulos, stem](CNID: Hydrozoa) The simple or branched upright portion <strong>of</strong>a hydroid colony; stem.

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