Adjective igneous has 2 senses
  1. igneous, pyrogenic, pyrogenous - produced under conditions involving intense heat; "igneous rock is rock formed by solidification from a molten state; especially from molten magma"; "igneous fusion is fusion by heat alone"; "pyrogenic strata"
  2. fiery, igneous - like or suggestive of fire; "the burning sand"; "a fiery desert wind"; "an igneous desert atmosphere"
    Antonym: cold (indirect, via hot)
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