Version of the MGEDOntology. MO_148 place_holder ontology A group of FactorValues which refer to the same condition used to treat or describe a BioMaterial, e.g. 10% glucose, 1 hour OR larval stage, age 24 hours. some|has_value|string 1.1.9 deleted_term The term was deleted from the MGED CoreOntology.