Our online medical glossary of medical terms and definitions includes definitions for terms related to treatment, and general medicine
KILLER
1. One who deprives of life; one who, or that which, kills.
2. A voracious, toothedwhale of the genus Orca, of which different species are known.
The killers have a talldorsal fin, and powerful jaws armed with big, sharp teeth. They capture, and swallow entire, big numbers of seals, porpoises, and dolphins, and are celebrated for their savage, combined attacks upon the right whales, which they are said to mutilate and kill. The general Atlantic species (Orca gladiator), is found both on the European and the American coast. Two species (Orca ater and O. Rectipinna) occur on the Pacific coast.
Source: Websters Vocabulary