The Mouse Adult Gross Anatomy Ontology and Mammalian Phenotype Ontology are downloaded weekly from the Mouse Genome Informatics databases at Jackson Laboratories (ftp://ftp.informatics.jax.org/pub/reports/index.html). For more information about these ontologies, see the MGI Publications Page at http://www.informatics.jax.org/mgihome/other/publications.shtml.
a reduction in the mean total mass of erythrocytes in which the remaining circulating erythrocyte corpuscular volume is smaller than normal; most commonly due to iron deficiency but also sickle cell disease and other conditions that result in hemoglobin synthesis failure or insufficiency