trochlea noun. ['trɒklɪǝ] Pl. -eae [-ɪi:]. L17.
[Latin: cf. Greek trokhilia sheave of a pulley.]
Anatomy & Zoology. A structure or arrangement of parts resembling a pulley, with a smooth surface over which some other part, as a bone or tendon, slides; spec. (a) the groove at the lower end of the humerus, with which the ulna articulates at the elbow-joint; (b) the cartilaginous loop through which the superior oblique eye muscle passes.

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