umls-concept:C1704353 | skos:definition | CSP: nonsolid state of matter in which the atoms or molecules are free to move past each other, as in a gas or liquid.,NCI: A substance that flows smoothly and takes the shape of its container. Liquids and gases are fluids.,NCI: A continuous amorphous substance that tends to flow and to conform to the outline of its container (i.e., a liquid or a gas). Also used as an adjective to describe something with properties like that of a fluid. | lld:umls |