corallum

plural corallums · plural coralla

1. obsoletebiologyThe skeleton of a coral. It can be calcareous or horny, simple or compound.

   1 more example

   I am fortunate enough to possess fine specimens of some three or four varieties of living, working coral "polyps," for such is the name by which the coral-builder is designated. These specimens are kept in pure sea-water, and I have studied their habits very carefully for years; they seem to be in perfect health, full of activity, and generally industrious, although I can hardly observe that they have added to their corallum during this period.

   1878 April 28, William Emerson Damon, “Popular Science Monthly”, in (Please provide the book title or journal name), Living Corals