plural of hammerhead

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

Alternative form of hammer-headed

(genetics) Any of a class of self-cleaving RNAs found in some viroids.

plural of hammerhead shark

Any of various sharks of the genus Sphyrna having the eyes set on projections (cephalofoils) from the sides of the head, which gives it a hammer shape. / A winghead shark (Eusphyra blochii).

plural of hammerhead ribozyme

(aviation) A turnaround maneuver in aerobatics.

plural of hammerhead turn