Online Dictionary of Invertebrate Zoology: Complete Work - Best Text

Online Dictionary of Invertebrate Zoology 469abruptly pressed inward; a cut or notch in a margin.indeterminate a. [L. in, not; determinare, to limit] Not welldefined; vague; indefinite.index n.; pl. indexes [L. indicare, to point out] A number expressingthe relationship of one quantity to another by expressingthem as ratios of a third quantity.indigenous a. [L. indigena, native] Being native to or originatingin a specified place or country.indigoid biochrome Various blues and purples derived by themetabolism of trytophan found in plants and mollusks.indirect life cycle see heterogonic life cycleindirect nuclear division 1. Typical = mitosis. 2. Atypical =meiosis.inducer n. [L. in, in; ducere, to lead] A small molecule whichcauses an increase in the rate of enzyme synthesis whenpresent.induction n. [L. in, in; ducere, to lead] Increase of the rate ofproduction of an enzyme caused by an inducer molecule.inductor see organizerinductura n. [L. inductura, a coating] (MOLL: Gastropoda)Smooth shelly layer of the shell secreted by the mantle,extending from the inner side of the aperture over the parietalregion, columellar lip, and part or all of the shell exterior.indumentum n. [L. indumentum, garment] Covered by hairs,scales or tufts.indurate a. [L. induratare, to make hard] Hardened.indusium n.; pl. -sia [L. indusium, tunic] (ARTHRO: Insecta) 1.A larva casing. 2. The third covering of embryonic membraneformed from a thickening of the serosa in front of thehead.industrial melanism The evolution of a darkened populationowing to melanistic individuals that blend with their substratein the sooty surroundings of an industrial area.inequal a. [L. in, not; aequus, equal] Having irregular elevationsor depressions.