Properly a small channel or canal, and also used in the following special senses: to denote
the channel or barrel of a catapult (Vitruv. x. 15);
a splint (Cels. viii. 2
the grooves carved on the face of a triglyph between the three uprights (femina
), while those at each end where the
sank to the level of the metope were called semicanaliculi.