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 procedure or technique performed outside the living body, for example, a procedure performed on an organ or tissue after removal from the body, to measure the thickness or diameter of a solid using a compass with bent or curved legs or a device comprised of a calibrated scale with a fixed jaw, and another jaw, with a pointer, that slides along the scale from which the distance between the two pieces can be read.