exotheca

noun

exotheca

noun

Etymology From exo- + theca (“the calcareous wall of a corallite”).

Biology, Natural sciences, Zoology The tissue that fills the interspaces between the costae of many madreporarian corals, usually consisting of small transverse or oblique septa.

Derived terms: exothecal, endotheca

Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — list of authors.