sword tail

swordtail

[sawrd-teyl, sohrd-]
noun
any of several small, brightly colored, viviparous, freshwater fishes of the genus Xiphophorus, native to Central America, having the lower part of the caudal fin elongated into a swordlike structure: often kept in aquariums.
Also called helleri.


Origin:
1925–30; sword + tail1

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World English Dictionary
swordtail (ˈsɔːdˌteɪl)
 
n
any of several small freshwater cyprinodont fishes of the genus Xiphophorus, esp X. helleri, of Central America, having a long swordlike tail

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