trīˈästēəm noun
Usage: capitalized
Etymology: New Latin, short for Triosteospermum, from tri- + oste- + -spermum; from the usually three bony nutlets of the fruit
: a genus of Asiatic and No. American herbs (family Caprifoliaceae) having connate or perfoliate entire leaves and purple or yellowish tubular flowers usually sessile in the axils — see feverroot