Flexid

A flexid or flexus is said to abut when the enamel of the flexid or flexus touches the enamel of the opposite side of the tooth. The distal end or termination of the flexid or flexus is described as flattened, rounded or narrowed.

Lower premolar tetralophodont, with two labial and two lingual flexids; tooth usually divided by one central flexid into two V-shaped lophs […]