2. A Latin adjective describing any joint in an extremity that is deformed, such that the more distal of the two bones forming a joint deviates away from the midline, as in knock-knee.
Valgus is a form of the adjective which is used only with masculine nouns [hallux valgus (s.), coxae valgae (pl.)]. With feminine nouns, the form valga is used [coxa valga (s.), coxae valgae (pl.)], and with neuter nouns, the form valgum [genu valgum (s.), genua valga (pl.)].
2. A displacement of the big toe away from the midline at the metatarsophalangeal joint.
When the joint is covered with an adventitious bursa, it is called a bunion.