rhi·nan·tha·ce·ae I. \ˌrīˌnanˈthāsēˌē\noun plural Usage: capitalized Etymology: New Latin, from Rhinanthus, type genus + -aceae in some especially former classifications: a family of dicotyledonous plants that includes those figworts having the lower lip or lateral lobes of the corolla external in the bud II. synonym of scrophulariaceae