nCyathophylloid(Paleon) A fossil coral of the family Cyathophyllidæ; sometimes extended to fossil corals of other related families belonging to the group Rugosa; -- also called cup corals. Thay are found in paleozoic rocks.
aCyathophylloid(Paleon) Like, or pertaining to, the family Cyathophyllidæ.
Century Dictionary and Cyclopedia
cyathophylloidResembling the Cyathophyllidæ.
Webster's Revised Unabridged Dictionary
NL. cyathophyllum, fr. Gr. ky`aqos a cup + fy`llon a leaf
When are cyathophylloid corals to be found in fossiliferous sandstone of Tertiary origin?