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.
absence of or failure to develop the part of a tooth that is implanted in the gum; normally, the root is located below the neck of the tooth, covered by cementum rather than enamel, and attached by the periodontal ligament to the alveolar bone
Synonyms:
exact_synonym:
absence of tooth root; absent dental root; agenesis of tooth root; aplasia of tooth root; rootless teeth; rootless tooth