coral snake

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun Any of various venomous elapid snakes chiefly of the genus Micrurus of tropical America and the southern United States, characteristically having bright red, yellow, and black bands.

from The Century Dictionary.

• noun One of many different serpents, some of which are venomous and others not, which are marked with red zones, suggesting the color of coral.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun 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.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun any of various venomous elapid snakes of Asia and Africa and Australia
• noun 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