Reference

{
  "id": "MLC-T-ENV-023497",
  "term": "Reference",
  "field": "Environment",
  "definition": "1. A physical or chemical quantity whose value is known exactly, and thus is used to calibrate or standardize instruments.\n\n2. A reference site or set of reference sites.\n\n3. An environmental attribute of a reference site or a set of reference sites; for example, dissolved oxygen concentrations at a reference site represent reference concentrations.",
  "abbreviation": "REF",
  "subject": "Policy and guidance",
  "references": [
    "Drinking Water Technical & Legal Terms",
    "CADDIS Glossary"
  ],
  "url": "https://mlchart.com/terminology/environment/reference/"
}