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 the color of the hair, wool, or fur of an organism, that is, of either a single cylindrical, keratinized, often pigmented filament characteristically growing from the epidermis of a mammal, or of the aggregate of all such filaments. Color is property of a surface or substance due to absorption of certain light rays and reflection of others within the range of wavelengths (roughly 370-760 nm) adequate to excite the retinal receptors.