swordtail

noun

A small, brightly colored, live-bearing freshwater fish (Xiphophorus hellerii) of Mexico and Central America, having a long tapering extension of the caudal fin in the male and popular in home aquariums.

A crustacean of the group Xiphosura, as the horseshoe- or king-crab. See cuts under horseshoe-crab and Limulus.

Any bug of the genus Uroxiphus, as U. caryæ, the walnut swordtail.

Same as sword-bearer .

The limulus.