Zool. [f. Gr. κοιν-ός common + ὀστέον bone.] The common calcareous skeleton of the Hydrocorallina, a division of the Hydrozoa, as of millepore coral.
1880. Moseley, Zool. Challenger Exped., VII. 12. The hard tissue is here termed cœnosteum to distinguish it from the Anthozoan corallum.
1888. Rolleston & Jackson, Anim. Life, 776. Stylasteridae: coenosteum arborescent.
