Read Edit View history 切触 qièchù osculation Origin Definitions Defs Strokes Stroke Words Sentences Sents created sense approved 切触/切觸 · qièchù · osculation 2026/03/04 切触 / 切觸 qièchù osculation osculation (higher order tangency) 这两个曲线在原点处切触。 verb created sense Mar 4, 2026, 02:25 AM