From Latin 'grānum' (seed), from PIE *ǵr̥h₂-nóm — one of humanity's oldest agricultural words.
A small hard seed of a cereal plant; a tiny particle.
From Old French 'grain,' from Latin 'grānum' (seed, kernel), from PIE *ǵr̥h₂-nóm. One of the oldest agricultural words. Key roots: *ǵr̥h₂-nóm (PIE: "grain, seed").