noun
density; coarseness and fineness; sparseness and denseness
Refers to the degree of density or the contrast between sparse and dense areas, often used in technical or descriptive contexts such as growth patterns, textures, or distributions.
森林の粗密を調べる。
Examine the density of the forest.
この布は糸の粗密が不均一だ。
This cloth has uneven thread density.
密度 is the standard word for 'density' in scientific and everyday contexts. 粗密 emphasizes the contrast between coarse/sparse and fine/dense, and is less common.
Compound of 粗 (coarse, rough) and 密 (dense, fine). The reading そみつ follows the on'yomi of both characters.