coral snake

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. Any of various venomous snakes of the genus Micrurus, native to tropical America and the southern United States, characteristically having brilliant red, yellow, and black banded markings.

Century Dictionary and Cyclopedia

1. n. One of many different serpents, some of which are venomous and others not, which are marked with red zones, suggesting the color of coral. The species of the genus Elaps, as E. fulvius, the harlequinsnake of the southern United States, beautifully ringed with red, yellow, and black, and especially E. corallina. These serpents are poisonous.

Wiktionary

1. n. Any of various venomous snakes of the genera Micrurus and Micruroides, native to tropical South America and Southern USA and having bright bands of red, yellow and black.

GNU Webster's 1913

1. n. (Zo) A small, harmless, South American snake (Tortrix scytale).

WordNet 3.0

1. n. any of various venomous elapid snakes of Asia and Africa and Australia
2. n. any of several venomous New World snakes brilliantly banded in red and black and either yellow or white; widely distributed in South America and Central America