any of a number of brightly colored, freshwater livebearer fishes (genus Xiphophorus) of Central America: used in tropical aquariums
See platy in American Heritage Dictionary 4
(plāˈtē)
adjectiveplat·i·er, plat·i·est
Designating soil or minerals occurring in flaky layers.
(plătˈē)
nounpl.plat·ys or plat·ies
Any of several small freshwater live-bearing fishes of the genus Xiphophorus of southern North America popular in aquariums for their bright and variable colors. Also called platyfish.