noun
hallux valgus; bunion
Medical term for the deformity where the big toe angles toward the second toe, often with a bony bump. Rare in everyday language; the more common term is 外反母趾 (がいはんぼし).
See also: 外反母趾
母趾外反症は、足の親指が小指側に曲がる病気です。
Hallux valgus is a condition where the big toe bends toward the little toe.
Common term for the same condition; 母趾外反症 is a rarer, more formal medical synonym.
Compound of 母趾 (ぼし, 'big toe'), 外反 (がいはん, 'turning outward'), and 症 (しょう, 'condition'). The derivation is transparent from the kanji components.