Wordnet 3.0
NOUN (1)
1.
offspring of a coyote and a dog;
The Collaborative International Dictionary of English v.0.48:
coydog \coydog\ n.
the offspring of a coyote and a dog.
Syn: coy-dog.
[WordNet 1.5]
WordNet (r) 3.0 (2006):
coydog
n 1: offspring of a coyote and a dog