Origin of incisorModern Latin from Classical Latin incisus (see incise) + -or
a cutting tooth; any of the front teeth between the canines in either jaw: in humans there are eight incisors
A tooth adapted for cutting or gnawing, located at the front of the mouth along the apex of the dental arch.
From New Latin incisor, from Latin incisus + -or.
- The upper incisor teeth are generally marked by grooves.
- The first upper incisor is much larger than the others; canine and first two premolars rudimentary.
- In the more typical Lemuridae there are two pairs of upper incisor teeth, separated by a gap in the middle line; the premolars may be either two or three, but the molars, as in the lower jaw, are always three on each side.
- Its affinity with the giraffes is, however, clearly revealed by the structure of the skull and teeth, more especially the bilobed crown to the incisor-like lower canine teeth.
- The third incisor in both upper and lower jaws is large, developed before the others, with much the size, form and direction of the canine.