Word Study
guan
CIDE DICTIONARY
guan, n.
Any one of many species of large gallinaceous birds of Central and South America, belonging to Penelope , Pipile , Ortalis , and allied genera. Several of the species are often domesticated. [1913 Webster]
OXFORD DICTIONARY
guan, n. any of various game-birds of the family Cracidae, of tropical America.
Etymology
prob. f. a native name
For further exploring for "guan" in Webster Dictionary Online