The Collaborative International Dictionary of English v.0.48:
croaky \croaky\ adj. like the sounds of frogs and crows; as, acres of croaky frogs. Syn: croaking, guttural. [WordNet 1.5]WordNet (r) 3.0 (2006):
croaky adj 1: like the sounds of frogs and crows; "a guttural voice"; "acres of guttural frogs" [syn: croaky, guttural]