"syrup made from pomegranates," 1896, from French sirop de grenadin from grenade "pomegranate" (see pomegranate). The type of thin silk fabric, so called from 1851, probably is from Grenada.
Entries linking to grenadine
pomegranate n.
c. 1300, poumgarnet (a metathesized form), "the large, roundish, many-seeded, red-pulped fruit of the pomegranate tree," from Old French pome grenate (Modern French grenade) and directly from Medieval Latin pomum granatum, literally "apple with many seeds," from pome "apple; fruit" (see Pomona) + grenate "having grains," from Latin granata, fem. of granatus, from granum "grain" (from PIE root *gre-no- "grain").
The classical Latin name was mālum granatum "seeded apple" or mālum Punicum "Punic apple." Italian form is granata, Spanish is granada. The -gra- spelling was restored in English early 15c. Of the tree itself from late 14c.
Grenada
West Indies island, discovered by Columbus Aug, 15, 1498, and named by him Concepción, the place later was renamed for the old Spanish kingdom or city of Granada. Related: Grenadian.
*gre-no-
*grə-no-, Proto-Indo-European root meaning "grain."
It forms all or part of: corn (n.1); filigree; garner; garnet; grain; granary; grange; granger; granite; granular; granule; grenade; grenadine; kernel; pomegranate.
It is the hypothetical source of/evidence for its existence is provided by: Latin granum "seed," Old Church Slavonic zruno "grain," Lithuanian žirnis "pea," Old English corn.