Stories We Like: A Guide to the Comma
1743, from Latin cuspis (genitive cuspidus) "point, pointed end" (see cusp). Of teeth, from 1878. Related: Cuspidate (adj.), attested from 1690s.
cuspid cus·pid (kŭs'pĭd)n. See canine tooth. adj. Having one cusp; cuspidate.
multicuspid mul·ti·cus·pid (mŭl'tē-kŭs'pĭd, mŭl'tī-)n. A molar tooth with three or more cusps or projections on the crown.