Plural of grenadine; multiple servings or bottles of the syrup, or small silk or woolen fabric with a granular texture.
From grenadine + -s (regular English pluralization), with textile sense coming from French fabric terminology.
Grenadine as a fabric was woven to have a pebbled texture resembling pomegranate seeds (grains), showing how the pomegranate metaphor extended beyond food into textile manufacturing.
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