ty·pha·ce·ae \tīˈfāsēˌē\noun plural Usage: capitalized Etymology: New Latin, from Typha, type genus + -aceae : a family of perennial marsh plants (order Pandanales) with creeping rootstocks, long linear leaves, and cylindrical spikes of flowers • ty·pha·ceous\(ˈ)tī|fāshəs\adjective