The Collaborative International Dictionary
Corallian
Corallian \Co*ral"li*an\, n. (Geol.) A deposit of coralliferous limestone forming a portion of the middle division of the o["o]lite; -- called also coral-rag.
Wiktionary
corallian
n. (context geology English) A deposit of coralliferous limestone forming a portion of the middle division of the oolite.