bow legs; bow-leggedness
Refers to a condition where the legs curve outward at the knees, resembling the letter O. Often contrasted with Ｘ脚 (knock knees).
See also: Ｘ脚
He uses insoles to correct his bow legs.
Bow legs not only affect appearance but can also cause knee pain.
From the shape of the letter O, describing the outward curve of the legs. The reading オーきゃく combines the katakana reading of O (オー) with 脚 (きゃく, 'leg').