Source:http://linkedlifedata.com/resource/umls/id/C0302908
NCI: A substance in the fluid state of matter having no fixed shape but a fixed volume.,HL7V3.0: <p>A state of substance that is an intermediate one entered into as matter goes from solid to gas; liquids are also intermediate in that they have neither the orderliness of a crystal nor the randomness of a gas. (Note: This term should not be used to describe solutions, only pure chemicals in their liquid state.)</p>