American Heritage Dictionary
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Century Dictionary
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GNU Webster's 1913
WordNet
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Elsewhere on the web
I give it in extenso The serow is an ungainly-looking animal, combining the characteristics of the cow, the donkey, the pig, and the goat!— Natural History of the Mammalia of India and Ceylon
Although very shy and difficult to find, the serow is a fierce and dangerous brute when wounded and brought to bay.— Natural History of the Mammalia of India and Ceylon
Of course they had to find something, so this time they found a "serow"--a somewhat scarce beast.— A Holiday in the Happy Valley with Pen and Pencil
Who ever heard of Fostum Sahib, or Yankling Sahib, or even the little Peel Sahib that sits up of nights to shoot serow--I say, who, ever heard of these Sahibs coming into the hills without a down-country cook, and a bearer, and--and all manner of well-paid, high-handed and oppressive folk in their tail?— Kim
Kim heard tales of shots missed upon ibex, serow, or markhor, by Sahibs twenty years in their graves--every detail lighted from behind like twigs on tree-tops seen against lightning.— Kim

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