Main Entry:

sprock·et

Pronunciation:

\ˈsprä-kət\

Function:

noun

Etymology:

origin unknown

Date:

1886

1 : a toothed wheel whose teeth engage the links of a chain 2 : a cylinder with teeth around the circumference at either end that project through perforations in something (as motion-picture film) to move it through a mechanism (as a projector)