D defs.my
Entry 1 sense Webster, 1913

Superheated

· Su·per·heat·ed · IPA /sˌuːpərhˈiːtɪd/
01 heated to a temperature above the boiling point at the ambient pressure; -- said of liquids. In such an unstable condition, a small distur…
  1. 1.
    heated to a temperature above the boiling point at the ambient pressure; -- said of liquids. In such an unstable condition, a small disturbance of the liquid can cause a rapid and sometimes violent ebullition of vapor.