any of several prickly climbing plants of the liliaceous genus Smilax, esp S. rotundifolia of the eastern US, which has small green flowers and blackish berries
Also called: cat brier
greenbrier in American English
(ˈgrinˌbraɪər)
US
noun
any of several climbing woody vines (genus Smilax) of the lily family, with prickly stems, oval leaves, and, usually, black berries