Inner ligamentinner layer of ligament see resilium

inbner line (MOLL: Gastropoda) That part of the peristome against the pillar.

inner lip (MOLL: Gastropoda) The inner edge of the aperture of a univalve shell extending from the foot of the columella to the suture; columellar and parietal lips collectively. see outer lip.

innervate v. [L. in, in; nervus, tendon] To supply nerves to an organ or part.

inner vesicle see ooecial vesicle inocular antennae (ARTHRO: Insecta) Antennae with base partly or wholly surrounded by the eye. see eye-bridge.

inoculation n. [L. in, in; oculare, to furnish with eyes] 1. Active or passive introduction of parasites into the body of a host. 2. Introduction of an inoculum into a culture medium.

inoperculate a. [L. in, not; operculum, a cover, lid] Without an operculum, as a garden snail.

inosculate v. [L. in, in; osculum, little mouth] To anastomose.

inquiline n. [L. inquilinus, tenant] 1. A commensal organism that lives habitually on or within the body of another, or in its nest or abode without benefit or damage to either; a guest. see inquilinism. 2. An animal that lives in the home of another species and derives a share of its food. see in-quilinism. 3. An insect developing inside a gall produced by another species. inquilinous a.

inquilinism n. [L. inquilinus, tenant; -ismus, condition] 1. The relationship between two organisms sharing an abode without benefit or damage to either. 2. (ARTHRO: Insecta) The relationship of a socially parasitic species that spends its entire life cycle in the nest of a host species; workers are either lacking or scarce and degenerate in behavior; permanent parasitism.

inquirende n.pl.; sing. -da [L. in, in; quaerere, to seek] Under inquiry or investigation; needs study.

Insecta, insects n.; n.pl. [L. insectum, cut into] A class of Arthropoda generally having a tracheate respiratory system, a single pair of antennae, and the body somites grouped into three functional tagmata: the head, thorax (bearing three pairs of legs) and abdomen.

insectarium n.; pl. -ia [L. insectum, cut into] A building where insects are propagated or the collection contained therein.

insectean, insectan a. [L. insectum, cut into] (ARTHRO: Insecta) Referring to or characteristic of insects in general.

insectivorous a. [L. insectum, cut into; vorare, to devour] Feeding on insects.

insectorubins n.pl. [L. insectum, cut into; ruber, red] Red or red-brown eye pigments of insects, produced by the oxidation of tryptophane.

insect ovary types (ARTHRO: Insecta) There are three types of ovaries: 1. Panoistic. 2. Polytrophic meroistic. 3. Telotro-phic meroistic. see separate entries.

insectoverdin n. [L. insectum, cut into; viridis, green] (ARTHRO: Insecta) A blue pigment (usually mesobiliverdin) in combination with carotenoids which produce the green coloring of insects. see green pigments.

insect society (ARTHRO: Insecta) Strictly a colony of eusocial insects.

insect sociology (sociobiology) The study of population characteristics related to social behavior in insects.

insemination n. [L. inseminare, to sow] The introduction of spermatozoa into the female reproductive tract. see semination.

inserted a. [L. in, in; serere, to join] Joined by natural growth; a muscle attached to a movable part.

insertion n. [L. in, in; serere, to join] 1. Movable end of a muscular attachment. 2. Translocation in genetics.

insertion plate (MOLL: Polyplacophora) A narrow marginal extension of the articulamentum layer in the head and tail valves and sides of the intermediate valves, projecting into the girdle; lamina of insertion.

insolation n. [L. in, into; sol, sun] Exposure to the rays of the sun.

inspissate v. [L. in, into; spissus, thick, dense] To bring greater consistency; to thicken.

instar n. [L. instar, form] 1. An insect or nematode at a particular larval period or stage between molts. 2. (ARTHRO: Insecta) Numbered to designate the various periods, i.e., first instar, second instar, etc.; can be abbreviated 1°, 2°, 3°. see stadium.

instinct n. [L. instinctus, impulse] A usually invariable complex response natural to a species, independent of any previous experience of the individual.

intectate a. [L. in, not; tectum, roof] Lacking a tectum.

integration n. [L. integer, whole] (BRYO) Changes in individual zooid morphology brought about by colonial living.

integripalliate a. [L. integer, whole; pallium, mantle] (MOLL: Bivalvia) Having a pallial line entire; lacking a sinus, as clams or oysters.

integument n. [L. integumentum, covering] The outer covering of the body.

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