Apisthognathous see opisthognathous

apitoxin n. [L. apis, honeybee; Gr. toxikon, poison] The main toxic constituent of bee venom.

apivorous a. [L. apis, honeybee; vorare, devour] Refers to feeding on bees.

aplasia n. [Gr. an, without; plasma, formed or molded] 1. The entire failure of organs or tissue to develop. 2. Incomplete or faulty development. aplastic a. see agenesis.

apneumone n. [Gr. an, without; pneuma, air] A substance emitted by a nonliving material that envokes a behavioral or physiological reaction favorable to the receiving organism, but detrimental to another species that may be found in or on the nonliving material. see allelochemic.

apneustic a. [Gr. an, without; pneustos, breath] 1. Lacking external breathing organs. 2. (ARTHRO: Insecta) Lacking spiracles, or supplied with nonfunctional spiracles, as in aquatic forms.

apobiotic a. [Gr. apo, away; biotikos, of life] Of or pertaining to any change leading to diminished cells or tissues.

apocentric a. [Gr. apo, away; kentron, center] Deviating from the original type. see archecentric.

apochete n. [Gr. apo, away; cheo, pour] (PORIF) An exhalant canal that extends from the apopyles to apopore.

apocrite a. [Gr. apo, away; krinein, to separate] (ARTHRO: Insecta) Pertaining to Hymenoptera in which the first abdominal segment is fused to the reduced metathorax to form a narrow waist.

apodal a. [Gr. a, without; pous, foot] Lacking feet or legs; apodous.

apodeme, apodema n. [Gr. apo, away; demas, body] An invagination of the cuticle that serves for muscle attachment and for strengthening of the body wall. see apophysis, apodome.

apoderma n. [Gr. apo, away; derma, skin] (ARTHRO: Chelicer-ata) The membrane developed during resting stage of instars of certain Acari.

apodictic, apodeictic, apodictal a. [Gr. apodeiktos, proving fully] Being evident beyond contradiction; clearly proving.

apodome n. [Gr. apo, away; L. domus, roof] (ARTHRO) The internal portions of a skeleton, consisting of both apodeme and apophysis; sometimes used as synonymous with apodeme.

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