Pronunciation: (ham'ur-hed"),[key] —n. 1. the part of a hammer designed for striking.
2. a shark of the genus Sphyrna, esp. S. zygaena, having the head expanded laterally so as to resemble a double-headed hammer, sometimes dangerous to swimmers.
3. Also called ham•mer•kopPronunciation: (ham'ur-kop").[key]a brown heronlike African bird, Scopus umbretta, having the head so crested as to resemble a claw hammer.
4. See flatheaded borer. 5. Slang.blockhead; dunce; lout.