Nil·gau n. Zool. see Nylghau.
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  Nyl·ghau, Nyl·gau  n.  Zool. A large Asiatic antelope (Boselaphus tragocamelus, syn. Portax tragocamelus), found in Northern India; called also the blue bull.  It has short horns, a black mane, and a bunch of long hair on the throat.  The general color is grayish brown; the male is blue-grey with white markings, and the female is brownish with no horns. [Written also neelghau, nilgau, nylghai, and nylghaie.]
  Syn: -- nilgai, nylghai, blue bull, Boselaphus tragocamelus.
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