The Clinical Measurement Ontology (CMO), Measurement Methods Ontology (MMO), and Experimental Condition Ontology (XCO) are currently being developed at the Rat Genome Database. For more information about these vocabularies please see Shimoyama et al. Three ontologies to define phenotype measurement data. Front Genet. 2012;3:87. Epub 2012 May 28 or contact us (http://rgd.mcw.edu/contact/index.shtml).
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.