Wordnet 3.0
NOUN (1)
1.
large harsh-voiced American wren of arid regions of the United States southwest and Mexico;
The Collaborative International Dictionary of English v.0.48:
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]
WordNet (r) 3.0 (2006):
cactus wren
n 1: large harsh-voiced American wren of arid regions of the
United States southwest and Mexico