Iliotibial Band Syndrome. Iliotibial band syndrome (ITBS) occurs when there is irritation to this band of fibrous tissue. The irritation usually occurs at the prominence of the outside of the knee joint, the lateral condyle which is located at the end of the femur (thigh) bone.
biennium definition: The definition of a biennium is a period of two years. (noun) Your two-year cell phone contract is an example of a biennium....
Definition of nucleus for English Language Learners. 1  biology : the central part of most cells that contains genetic material and is enclosed in a membrane. 2  physics : the central part of an atom that is made up of protons and neutrons. : 3  a central or most important part of something.