hammerhead

noun

1. The portion of a hammer containing the metal striking face (also including the claw or peen if so equipped).

   “Holonym: hammer”

   “Meronym: hammer face”

2. Any organism with head shaped like that of a hammer:
3. Any organism with head shaped like that of a hammer:
4. Any organism with head shaped like that of a hammer:
5. Any organism with head shaped like that of a hammer:
6. (slang)A stupid person, a dunce.

   “[The butler] joined us with a telegram for Bobbie on a salver. From her mother, I presumed, calling me some name which she had forgotten to insert in previous communications. Or, of course, possibly expressing once more her conviction that I was a guffin, which, I thought, having had time to ponder over it, would be something in the nature of a bohunkus or a hammerhead.”

7. A turn-around; a parking area constructed in a subdivision for initial access and construction.
8. A kind of ribozyme; hammerhead ribozyme.