hamstring

¹ham·string

noun \ˈham-ˌstriŋ\

Definition of HAMSTRING

1

a : either of two groups of tendons bounding the upper part of the popliteal space at the back of the knee and forming the tendons of insertion of some muscles of the back of the thigh b : hamstring muscle

2

: a large tendon above and behind the hock of a quadruped corresponding to the human Achilles tendon