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).
Any measurement of a mature male gamete or germ cell that consists of a cylindrical nucleated cell with a short neck and a thin motile tail, contains genetic information to be transmitted by the male, exhibits autokinesia, and is able to effect zygosis with an ovum.