In
horology, a
movement, also known as a
caliber, is the mechanism of a
clock or
watch, as opposed to the
case, which encloses and protects the movement, and the
face which displays the time. The term originated with mechanical timepieces, whose
clockwork movements are made of many moving parts. It is less frequently applied to modern electronic or
quartz timepieces, where the word
module is often used instead.