Webster's Revised Unabridged Dictionary · 1913

Madreporian

Madreporian , adjective

(Zoology) Resembling, or pertaining to, the genus Madrepora.
Collocations (1)
Madreporic plate (Zoology) , a perforated plate in echinoderms, through which water is admitted to the ambulacral tubes; -- called also madreporic tubercule.

Also: Madreporic