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).
Measurement of the size of the three dimensional space occupied by the amount of water, the clear, colorless, odorless, tasteless liquid each molecule of which contains one atom of oxygen and two atoms of hydrogen (H2O), consumed as a drink in a specified period of time.