femur cross-sectional area femoral neck area femoral neck cross-sectional area 2013-07-10T12:51:05Z A measurement of the extent of a plane through, that is, perpendicular to the longest axis of, the femoral neck, the heavy, flattened, pyramidal process of bone connecting the head and the shaft of the femur, the major bone in the upper portion of the hindlimb of quadrupeds or the lower limb of bipeds. CMO:0001697 JSmith clinical_measurement_ontology total femoral neck cross-sectional area