val·gus adj \ˈval-gəs\
: varus 1—used especially in orthopedics of the knee <changes spontaneously from the initial varus (bowing) to a valgus position (knock-knee) at about age 2 to 3—Joan M. Walker>
Seen & Heard
What made you want to look up valgus? Please tell us where you read or heard it (including the quote, if possible).