Trochlea
Pronunciation : Troch"le*a
Part of Speech : n.
Etymology : [L., a case or sheaf containing one or more pulleys, Gr. Trochilics.]
Definition : 1. (Mach.)
Defn: A pulley. [Obs.]
2. (Anat.)
Defn: A pulley, or a structure resembling a pulley; as, the trochlea, or pulleylike end, of the humerus, which articulates with the ulna; or the trochlea, or fibrous ring, in the upper part of the orbit, through which the superior oblique, or trochlear, muscle of the eye passes.
Source : Webster's Unabridged Dictionary, 1913