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 direct measurement of two dimensional extent of the tunica media, the middle coat of the arterial wall, in a cross-section of an artery, one of the large blood vessels carrying blood in a direction away from the heart to the tissues. The total area of the tunica media gives an indication of the thickness of the arterial wall.