118 GLOSSARY. 
Trapezium (Gr. ¢rapezion, a geometrical figure, from 
trapeza, a small table or board).—A bone of 
the carpus of very irregular form. 
Trapezoid (Gr. ¢rapeza, a table; ezdos, shape).—One 
of the carpal bones. 
Tricuspid (L. ¢vza, three ; cusfzs, a point).—Having 
three points. 
Tridactyle (L. ¢rza, three ; Gr. daktulos, a finger or toe). 
—Having three digits. 
Tridentate (L. ¢za, three ; dens, dentis, a tooth).— 
Having three tooth-like divisions. 
Trochanter (Gr. zrochas, I roll or run round).—One of 
the two processes (sajor or minor) on the 
upper part of each femur. 
Trochlea (L. ¢rochlea, a case containing pulleys).— 
Applied to that part of the humerus articula- 
ting with the ulna. 
Tuber caleis (L. zwzder, a knob; calx, the heel).—The 
large posterior extremity of the os calcis. 
Tuberosity (L. tuber, a knob).—A term applied to any 
knob-like bony prominence, usually giving 
attachment to muscles. 
Tympanie (L. zympanum, a drum).—A bone in some 
Vertebrata surrounding the tympanum of 
the ear. 
Ulna (Gr. olene, the elbow).—The bone of the fore-arm, 
the proximal end of which forms the elbow 
in man. 
- UInare.—A bone of the carpus articulating with the 
ulna. 
