Online Dictionary of Invertebrate Zoology: Complete Work - Best Text

96Maggenti and Gardnershaped neuroglia cell. 2. Any star-shaped cell, especially instroma tissues.astrorhizae n.pl. [Gr. aster, star; rhiza, root] (PORIF) Starlikedepressions on the surface of the calcareous skeleton.astrosphere n. [Gr. aster, star; sphaira, ball] The central massof an aster lacking rays.astrotaxis n. [Gr. aster, star; taxis, arrangement] The orientationof certain organisms sensitive to polarized skylight,i.e., bees, ants and spiders.asymmetrical a. [Gr. asymmetros, without symmetry] Notsymmetrical; not alike on both sides of an axis; bilaterallyunequal.asymmetry n. [Gr. asymmetros, without symmetry] Lack ofsymmetry; unlikeness in form or development.asymptomatic a. [Gr. a, without; symptoma, a sign of disease]Lacking subjective evidence of a disease.asynaptic a. [Gr. a, without; synapsis, union] Pertaining to thecomplete failure or incomplete pairing of chromosomesduring the first meiotic division. asynapsis n.asynchronous a. [Gr. a, without; syn, together; chronos,time] Not simultaneous; not occurring at the same time.atactotrichy n. [Gr. ataktos, not arranged; trichos, hair]Chaetotaxy in which all setae are not describable in distinctpatterns and arrangements. see primordiotrichy.atavism n. [L. atavus, ancestor] Recurrence of an ancestralcharacter, after an interval of generations. atavistic a.ataxia n. [Gr. a, without; taxis, arrangement] Lacking musclecoordination.atelia n. [Gr. ateles, incompletedness] Incomplete or imperfectdevelopment.athecal a. [Gr. a, without; theke, case] (ANN) Without spermathecae.athecate a. [Gr. a, without; theke, case] 1. Lacking a theca. 2.(CNID: Hydrozoa) In Hydroids, lacking an investing cup orsheath.athericerous see aristate