trochlea
noun
troch·lea ˈträ-klē-ə 
: an anatomical structure that is held to resemble a pulley
especially : the articular surface on the medial condyle of the humerus that articulates with the ulna
Word History
Etymology
New Latin, from Latin, block of pulleys, from Greek trochileia, from trochilos sheave, from trochos wheel
First Known Use
circa 1693, in the meaning defined above
Medical Definition
trochlea
noun
troch·lea ˈträk-lē-ə
: an anatomical structure resembling a pulley: as
a
: the articular surface on the medial condyle of the humerus that articulates with the ulna
b
: the fibrous ring in the inner upper part of the orbit through which the tendon of the superior oblique muscle of the eye passes