Tortrix Tor"trix, n. [NL., fr. L. torquere, tortum, to twist.] 1. (Zo["o]l.) Any one of numerous species of small moths of the family Tortricid[ae], the larv[ae] of which usually roll up the leaves of plants on which they live; -- also called leaf roller. 2. (Zo["o]l.) A genus of tropical short-tailed snakes, which are not venomous. One species (Tortrix scytal[ae]) is handsomely banded with black, and is sometimes worn alive by the natives of Brazil for a necklace.