single-rib stitch; knit-one-purl-one rib stitch
A basic knitting pattern alternating one knit stitch and one purl stitch across rows, creating vertical ribs. Common in cuffs, collars, and hems.
I finished the edge of the scarf with single-rib stitch.
Single-rib stitch is stretchy, so it is often used for sweater hems.
Compound of 一目 (ひとめ, 'one stitch'), ゴム (from English 'gum' or Dutch 'gom', referring to rubber-like elasticity), and 編み (あみ, 'knitting'). The term describes a ribbing pattern that stretches like rubber.