From WordNet (r) 3.0 (2006) [wn]:
caribou
n 1: Arctic deer with large antlers in both sexes; called
`reindeer' in Eurasia and `caribou' in North America [syn:
caribou, reindeer, Greenland caribou, {Rangifer
tarandus}]
From The Collaborative International Dictionary of English v.0.48 [gcide]:
Caribou \Car"i*bou\ (k[a^]r"[i^]*b[=oo]), n. [Canadian French.]
(Zool.)
The American reindeer, especially the common or woodland
species (Rangifer Caribou).
[1913 Webster]
Barren Ground caribou. See under Barren.
Woodland caribou, the common reindeer (Rangifer Caribou)
of the northern forests of America.
[1913 Webster]