Online Dictionary of Invertebrate Zoology: Complete Work - Best Text

Online Dictionary of Invertebrate Zoology 97athermobiosis n. [Gr. a, without; thermos, hot; biosis, mannerof life] 1. Dormancy induced by low temperatures inrelation to an organism. 2. The process of waste eliminationduring a resting stage at low temperature.athrocyte n. [Gr. athroos, collected; kytos, container] A sessiletype of coelomocyte, phagocytic in function.athrocytosis n. [Gr. athroos, collected; kytos, container] Theability of cells to absorb and retain particles in suspension.atmosphere n. [Gr. atmos, vapor; sphaira, ball] 1. The outercircle of an ocellate spot. 2. The envelope of air aroundearth that supports life.atoke n. [Gr. a, without; tokos, birth] (ANN: Polychaeta) Theanterior sexless portion of certain marine worms. atokousa. see epitoke.atoll n. [Mal. atoll] A circular coral reef surrounding a centrallagoon.atom n. [L. atomus, a small particle] 1. Any extremely smallparticle, dot or point. 2. An elementary particle which entersinto a chemical reaction.ATP adenosine triphosphateatracheate a. [Gr. a, without; trachia, windpipe] Without tracheae,or visible constriction between head and prothorax.atractoid a. [Gr. atraktos, spindle; eidos, form] Pertaining tospindle-shaped; fusiform.atrial a. [L. atrium, vestibule] 1. Of or pertaining to an atrium.2. (ANN) Referring to glandular tissue associated with acleft or coelomic invagination containing the male pore.atrial bag (BRYO) That part of a polypidian vesicle attached tothe frontal wall of a developing zooid, from which the tentaclesheath is formed.atrial cavity In procordates, a cavity located between thepharynx and the body wall.atrial cornua (ANN: Hirudinoidea) Horns or hornlike prolongationsof the atrium.atrial gland (ANN) Prostates without stalks.atrial orifice (ARTHRO: Insecta) The exterior opening of the