Velum

{
  "id": "MLC-T-MET-009974",
  "term": "Velum",
  "field": "Meteorology and atmospheric science",
  "definition": "An accessory cloud formation appearing as a thin, horizontal veil or sheet that is attached to the upper part of a cumulus or cumulonimbus cloud. It forms when a strong updraft pushes moist air rapidly upward, causing condensation in a stable layer above the main cloud. Velum clouds are typically transient and indicate vigorous convection.",
  "see_also": [
    "cloud classification"
  ],
  "url": "https://mlchart.com/terminology/meteorology/velum/"
}