A syndrome characterized by pain or discomfort seemingly originating from the contact of the posterior surface of the patella (back of the kneecap) with the femur (thigh bone).

(mineralogy) An orthorhombic pale yellow mineral containing cobalt, hydrogen, magnesium, oxygen, silicon, and uranium.

(intransitive) To continue steadfast; to keep striving. / (intransitive) To serve as a soldier.

A solution of chlorine in water used as a bleaching agent