Noun
English Wikipedia has an article on:grain sizeWikipedia
grain size (plural grain sizes)
(geology, photography) The size of a grain (particle) in a sediment or emulsion
Grain size main seeAlso Sediment in the Gulf of Mexico Sediment off the Yucatán Peninsula Sediment size is measured on a log base 2 scale, called the "Phi" scale, which classifies particles by size from "colloid" to "boulder". Source: Internet
Grain size is a pretty big factor too…I prefer medium for yummy sticky white rice. Source: Internet