from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Strong and calcareous ectodermal tissue of milleporina.
from The Century Dictionary and Cyclopedia
- n. In zoology, the hard, calcareous ectodermal tissue of the hydrocorallines, as of millepore coral; the calcareous or coral-like mass of the hydrophyton of the hydrocoralline acalephs.
cœn- + o conjuncted with steum, from Ancient Greek: κοινός (koinos, "common") combined with ὀστέον (osteon, "bone"). (Wiktionary)