旋轮线 / 旋輪線

xuán​lún​xiàn

cycloid

the curve traced by a point on the rim of a circular wheel as it rolls along a straight line without slipping

旋 (literal) → 旋 · xuán · to revolve 轮 (literal) → 轮/輪 · lún · wheel 线 (literal) → 线/線 · xiàn · line (geometry)

Changed: simplified, traditional, gloss, definition, pinyin, variant pinyin, variants, separable parts, decomposition

created sense May 20, 2026, 07:58 PM