lateral stripes; transversal lines
Refers to horizontal stripes or lines, as opposed to vertical ones. Used in contexts like patterns, markings, or anatomical descriptions.
This fabric has fine lateral stripes.
魚の体に黒い横筋が見える。
You can see black lateral stripes on the fish's body.
Compound of 横 (yoko, 'horizontal') and 筋 (suji, 'line, stripe').