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.
any impediment or blockage of the canal through which urine is discharged from the bladder in most mammals and through which semen is discharged in the male; usually caused by calculus, or plugs composed of proteinaceous material, cellular debris and possibly crystals