the portion of a circle bounded by a chord and the corresponding arc; bow-shape

A condition where the legs curve outward so that the knees remain wide apart when the ankles are touching; also called [[O形腿|O形腿|ou1 xing2 tui3]], [[膝内翻|膝內翻|xi1 nei4 fan1]], or [[罗圈腿|羅圈腿|luo2 quan1 tui3]].

A species of parasitic protozoan that causes toxoplasmosis