Cactus \Cac"tus\, n.; pl. E. {Cactuses}, {Cacti} (-t[imac]).
[L., a kind of cactus, Gr. ??????.] (Bot.)
Any plant of the order {Cactac[ae]}, as the prickly pear and
the night-blooming cereus. See {Cereus}. They usually have
leafless stems and branches, often beset with clustered
thorns, and are mostly natives of the warmer parts of
America.
[1913 Webster]
{Cactus wren} (Zool.), an American wren of the genus
{Campylorhynchus}, of several species.
[1913 Webster]