Valve

{
  "id": "MLC-T-ENV-029480",
  "term": "Valve",
  "field": "Environment",
  "definition": "1. A shell on a mollusk. Mollusks with two shells (such as clams and oysters) are called bivalves.\n\n2. A movable mechanism that opens and closes to control the flow of liquid through a pipe or other passageway. Examples of valves include check, ball, and gate.",
  "subject": "Water",
  "references": [
    "Chesapeake Bay Glossary",
    "Oil Pollution Prevention Glossary"
  ],
  "url": "https://mlchart.com/terminology/environment/valve/"
}