Guinea fowl , Guinea hen Meaning, Definition & Usage

Definitions
  1. (Zoöl.), an African gallinaceous bird, of the genus Numida, allied to the pheasants. The common domesticated species (N. meleagris), has a colored fleshy horn on each aide of the head, and is of a dark gray color, variegated with small white spots. The crested Guinea fowl (N. cristata) is a finer species.

Webster 1913