Crus (Latin for 'leg', plural's "crura") or cnemis's the portion of the body starting from the ankle and ends at the knee. It's sometimes known as the gaiter. The tibia and fibula are the two bones of the calf. Crus can also refer to other anatomical structures that're leg-shaped: crura of antihelix crus cerebri crus of clitoris crus of diaphragm crura of heart crura of superficial inguinal ring crus of penis… (More on Crus)