Source:http://linkedlifedata.com/resource/umls/id/C0012833
MSH: An imprecise term which may refer to a sense of spatial disorientation, motion of the environment, or lightheadedness.,NCI: A disorder characterized by a disturbing sensation of lightheadedness, unsteadiness, giddiness, spinning or rocking.,NCI: A medically indistinct term used to describe a variety of conditions such as lightheadedness, unsteadiness, giddiness, a sense of turning, spinning or rocking.