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Adjective: intumescent  ,in-too'me-sunt or ,in-tyû'me-sunt [N. Amer], ,in-tyû'me-sunt [Brit]
  1. Abnormally expanded, esp. by fluids or gas
    "eyes with puffed (or intumescent) lids";
    - puffy, tumescent, tumid, turgid, distended, bloated, swollen
     
  2. Expanding on exposure to heat
    "an intumescent block allows air to flow through under normal conditions but closes under its own expansion when exposed to fire."

See also: unhealthy

Encyclopedia: Intumescent