Meaning

noun a pear-shaped tropical fruit with green or blackish skin and rich yellowish pulp enclosing a single large seed

noun tropical American tree bearing large pulpy green fruits

adjective of the dull yellowish green of the meat of an avocado

originBorrowed from Latin American Spanish avocado, from the earlier aguacate, which comes from Classical Nahuatl āhuacatl (“avocado”). Doublet of abacate. Compare aguacatillo, avocadillo. The first mention can be found in the 1696 catalogue of Jamaican plants.

Etymology from Wiktionary, CC BY-SA 3.0