hammerhead

名词noun

1. 1The portion of a hammer containing the metal striking face (also including the claw or peen if so equipped).
2. 2(zoology) Any organism with head shaped like that of a hammer:
3. 3slangA stupid person, a dunce.
4. 4A turn-around; a parking area constructed in a subdivision for initial access and construction.
5. 5(biology) A kind of ribozyme; hammerhead ribozyme