Gambusia affinis n 1: silvery topminnow with rows of black spots of tropical North America and West Indies; important in mosquito control [syn: {mosquitofish}, {Gambusia affinis}]
mosquitofish \mosquitofish\ n. A silvery topminnow ({Gambusia affinis}) with rows of black spots of tropical North America and West Indies; important in mosquito control. Syn: {Gambusia affinis}. [WordNet 1.5]