Source : Webster's Revised Unabridged Dictionary (1913)

Avocado \Av`o*ca"do\, n. [Corrupted from the Mexican ahuacatl:
   cf. Sp. aguacate, F. aguacat['e], avocat, G. avogadobaum.]
   The pulpy fruit of {Persea gratissima}, a tree of tropical
   America. It is about the size and shape of a large pear; --
   called also {avocado pear}, {alligator pear}, {midshipman's
   butter}.