trīˈthrīˌnaks, ˈtrithrəˌn- noun
Usage: capitalized
Etymology: New Latin, from tri- + Greek thrinax three-pronged fork, perhaps from thrin- (akin to Latin terni three each) + akmē point, edge; from the form of the leaves — more at tern , edge
: a genus of So. American fan palms having tough leaves with fibrous spiny sheaths, biconvex petiole, and prominent ligule