Specific gravity

{
  "id": "MLC-T-OAG-003530",
  "term": "Specific gravity",
  "field": "Oil and gas",
  "definition": "The ratio of a substance's density to the density of a reference substance, most often water for liquids and solids or air for gases, at specified conditions of temperature and pressure. As a dimensionless quantity, it is used to characterize fluids like crude oil, drilling muds, and natural gas. For crude oil, it is inversely related to API gravity, a more common industry measure.",
  "subject": "Geology",
  "url": "https://mlchart.com/terminology/oil-and-gas/specific-gravity/"
}