Definition of merise in US English:

merise

noun

archaic
  • A small bitter black cherry, the fruit of a variety of the gean, Prunus avium; the tree that bears this fruit.

Origin

Late 17th century; earliest use found in Charles Cotton (1630–1687), poet and translator. From French merise, probably aphetic from an unattested form *amerise, blend of amer bitter and cerise cherry; compare marasca.