Answer:

kneecaps

AnswerCrossword Clue
KNEECAPSPatellas
KNEECAPSProtectors of certain hinge joints
KNEECAPSPatellae
KNEECAPSWhat certain pads protect
KNEECAPSPatellae.
KNEECAPSPlaces for doctors' strikes?
KNEECAPSLargest sesamoid bones