- acanthostyle
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n. [Gr. akantha, thorn, spine; stylos, pillar]1. (BRYOZOA: Stenolaemata)A type of stylet with a smooth rod core of nonlaminated calcite, with sheath laminae usually strongly deflected toward the zoarial surface as spines; usually larger than paurostyle.2. (PORIFERA)A monactinal spicule covered with thorny processes.
Online Dictionary of Invertebrate Zoology. A.R. Maggenti and S.L. Gardne. 2005.