Main Entry:

ham·mer·head

Pronunciation:

\ˈha-mər-ˌhed\

Function:

noun

Date:

1562

1 : the striking part of a hammer 2 : blockhead 3 : any of a family (Sphyrnidae) of active voracious medium-sized sharks that have the eyes at the ends of lateral extensions of the flattened head — see shark illustration