'topminnow' definitions:
Definition of 'topminnow'
(from WordNet)
noun
Small usually brightly-colored viviparous surface-feeding fishes of fresh or brackish warm waters; often used in mosquito control [syn: topminnow, poeciliid fish, poeciliid, live-bearer]
noun
Freshwater fish of Central America having a long swordlike tail; popular aquarium fish [syn: swordtail, helleri, topminnow, Xyphophorus helleri]