n :  a rough prominence or process at the upper part of the femur of many vertebrates serving usu. for the attachment of muscles and being usu. two on each femur in mammals including humans:  a  :  a larger one situated on the outer part of the upper end of the shaft at its junction with the neck - called also greater trochanter   b  :  a smaller one situated at the lower back part of the junction of the shaft and neck - called also lesser trochanter  tro*chan*ter*ic adj 
 
 
 
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