alco

Noun

 * 1) A small South American dog, domesticated by the natives, now thought to be extinct.
 * 2) * 1803, John Browne Cutting, “A Succinct History of Jamaica” in, The History of the Maroons, London: Longman and Rees, Volume 1, pp.lxxviii-lxxix,
 * the alco, a mute little dog, caressing and sequacious, once loved and cherished by its poor Indian masters, is like them exterminated.

Etymology 2
Shortening.

Noun

 * 1)  An alcoholic.