- regular triact
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(PORIFERA)A megasclere spicule with three equal rays separated by angles of 120 degrees.
Online Dictionary of Invertebrate Zoology. A.R. Maggenti and S.L. Gardne. 2005.
regular triact
Look at other dictionaries:
triact — n. [Gr. treis, three; aktis, ray] (PORIFERA) A microsclere spicule with three rays; see regular triact, saggital triact … Dictionary of invertebrate zoology
