Alavertex see occiput

albinism n. [L. albus, white] The congenital deficiency of pigmentation, and particularly of melanin. see melanism.

albinistic a. [L. albus, white] Affected with albinism; tending toward whiteness of normally dark forms.

albumen n. [L. albumen, white of an egg] Egg white, containing several proteins, but consisting principally of albumin.

albumen gland (MOLL: Gastropoda) A gland that produces the perivitelline fluid that connects to a hermaphroditic gland.

albumin n. [L. albumen, white of an egg] One of a group of proteins present in blood serum, muscle, and other tissue.

albuminoid a. [L. albumen, white of an egg; Gr. eidos, form] Like or of the character of albumin, including collagen and keratin.

albuminoid spheres (ARTHRO: Insecta) Eosinophilic bodies that are liberated into the blood during molting and metamorphosis, formed by extruded chromatin granules of fat cells.

aleatory a. [L. alea, chance] Pertaining to organs that are existing or lacking, depending on chance. see vertition.

aletocyte n. [Gr. aletes, wanderer; kytos, container] A wandering cell; a phagocyte.

aleuritic acid (ARTHRO: Insecta) One of the organic acids contained in lac that is produced by certain scale insects.

algicolous a. [L. alga, seaweed; colere, to inhabit] Pertaining to an organism living on or around seaweed.

algophagous a. [L. alga, seaweed; Gr. phagein, to eat] Refer ring to any algae eating organism.

alienicola n.; pl. -colae [L. alienus, foreign; colere, to dwell] (ARTHRO: Insecta) In aphids, the parthenogenetic, viviparous female that mostly develops on the secondary host. see fundatrix, migrante.

alifer n. [L. ala, wing; ferre, to bear] (ARTHRO: Insecta) The pleural fulcrum of the wing.

alifera n.; pl. aliferae [L. ala, wing; ferre, to bear] (ARTHRO: Insecta) The projections of the pleuron, against which the pteralia of a wing articulates.

aliferous a. [L. ala, wing; ferre, to bear] Bearing or possessing wings.

aliform a. [L. ala, wing; forma, shape] Shaped like or resembling a wing; alary.

aliform apophyses (BRACHIO) Incurved anterior and posterior extremities of the growth line.

aliform muscles (ARTHRO: Insecta) Muscles closely associated with the heart, usually fan-shaped; sometimes also associated with the abdominal as well as the thoracic muscles.

alima n. [Gr. halimos, pert. the sea] (ARTHRO: Crustacea) The last larval stage of a mantis shrimp of the family Squillidae; a megalopa stage larva.

alimentary a. [L. alimentum, food] Pertaining to food or nutrition.

alimentary canal (tract) The food tube traversing the body from mouth to anus; generally divided into three main regions: the ectodermal foregut or stomodeum, the endodermal midgut or mesenteron and the ectodermal hindgut or proctodeum.

alimentary castration Pertaining to an individual deprived of sufficient nourishment in the larval form leading to suppression of gonadal development. see nutricial castration.

alinotum n. [L. ala, wing; Gr. noton, back] (ARTHRO: Insecta) The notal plate of the mesothorax or metathorax of winged forms.

aliphatic a. [Gr. aleiphos, fat] Refers to compounds having an open-chain structure, and those cyclic compounds that resemble the open-chain structure.

aliquant a. [L. alius, other; quantus, how great] In mathematics, dividing a smaller number into a larger number with a remainder; in biology, taking equal quantities of a solution with unequal numbers of organisms in suspension. see aliquot.

aliquot a. [L. alius, other; quantus, how great] In mathematics, dividing a smaller number into a larger number evenly; hence, in biology, dividing a population of organisms evenly or into equal parts. see aliquant.

alitrunk n. [L. ala, wing; truncus, trunk] (ARTHRO: Insecta) Thorax to which the wings are attached, including the first abdominal segment in certain Hymenoptera; mesosoma.

alivincular hinge (MOLL: Bivalvia) A somewhat flattened cord from one bivalve umbo to another, having the long axis transverse to the planes of the margins and the axis of motion.

alizarin, alizarine n. [F. alizari, the juice] A transparent orange-red stain or dye.

alkaline gland (ARTHRO: Insecta) In Hymenoptera, the Du-four's gland; an accessory gland that discharges at the base of the sting; function unknown, but thought to be concerned with lubrication of the sting.

alkanes [OF. al qualiy, ashes of salt wart] A group of saturated hydrocarbons found in Pre-Cambrian geological strata presumed to be fossils.

allaesthetic, allesthetic a. [Gr. allos, other; aisthetes, per-ceiver] Recognition of characteristics of an organism, as perceived by another.

allantoin n. [Gr. allas, sausage] The resultant of purine and pyrimidine metabolism occurring in allantoic fluid and urine of various invertebrates.

allatectomy n. [L. allatum, brought; Gr. ektemnein, to cut out] (ARTHRO: Insecta) Total excision of the endocrine glands, corpora allata.

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