Source:http://linkedlifedata.com/resource/umls/id/C0439234
NCI: The period of time that it takes for earth to make a complete revolution around the sun, approximately 365 days; a specific one year period.(NCI),NCI: A period of time that it takes for Earth to make a complete revolution around the sun, approximately 365 days; a specific one year period.,HL7V3.0: <p>1 a_j</p>