inductura 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 parietal region, 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 membrane formed from a thickening of the serosa in front of the head.
industrial melanism The evolution of a darkened population owing to melanistic individuals that blend with their substrate in the sooty surroundings of an industrial area.
inequal a. [L. in, not; aequus, equal] Having irregular elevations or depressions.
inequilateral a. [L. in, not; aequus, equal; latus, side] (MOLL: Bivalvia) Shells with unequal sides. see inequivalve.
inequilobate a. [L. in, not; aequus, equal; lobus, lobe] Having lobes of unequal size.
inequivalve a. [L. in, not; aequus, equal; valva, leaf of a door] (MOLL: Bivalvia) Having one valve larger, or of a different form from the other.
inerm, inermous a. [L. inermis, unarmed] Lacking striae, spines or other sharp processes. see mutic.
inert n. [L. iners, idle] Inactive; said of heterochromatin of chromosomes due to absence of gene mutations or effects on genetic balance; physiologically inactive.
infauna n. [L. in, into; Faunus, diety of herds and fields] Bottom burrowing animals of the sea. see epifauna.
inferior a. [L. inferior, lower] Situated below, near the base; underneath; behind.
inferior anal appendage (ARTHRO: Insecta) In Odonata, the lower one or two terminal abdominal appendages used in grasping the female at the time of copulation.
inferior groove (ARTHRO: Insecta) In Decapoda, a carapace groove, beginning at the junction of the hepatic and cervical grooves toward the lateral margin.
inferobranchiate a. [L. inferus, low; Gr. branchia, gills] (MOLL) Pertaining to gills under the mantle margin.
inferolateral a. [L. inferus, low; latus, side] Being below and at or towards the side.
infero-marginal plates (ECHINOD: Asteroidea) The lower marginal plates that form the outline of the arm. see su-pero-marginal plates.
inferomedian a. [L. inferus, low; medius, middle] Being below and about the middle.
inferoposterior a. [L. inferus, low; posterior, hinder] Below and behind.
infertility n. [F. infertilite] Infertile state or quality; inability to reproduce.
infestation n. [L. infestus, disturbed] The living in or on a host by metazoan parasites.
infiltration n. [L. in, in; filtrum, felt] Act or process of infilter-ing or permeating.
inflated a. [L. inflatus, inflated] 1. Expanded; distended. 2. (MOLL: Gastropoda) Applied to shells swollen, increased unduly, distended; ventricose.
inflation n. [L. in, in; flare, to blow] (MOLL: Bivalvia) The distance between the outermost points of the two valves.
inflected a. [L. in, in; flectere, to bend] Turned or bent inward or downward; inflexed.
inflexed a. [L. in, in; fectere, to bend] Curved, bent or directed inward or downward or toward the body axis; inflected.
influent a. [L. in, in; fluere, to flow] An animal or plant having an influence on other living forms.
informosome n. [L. in, in; formare, to form; Gr. soma, body] Messenger RNA combined with protein for protection as it moves from nucleus to cytoplasm.
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