Warm-blooded

adj

adj ·Rare ·Advanced level

Definitions

Adjective
  1. 1
    Maintaining a relatively constant and warm body temperature, regardless of the ambient temperature; endothermic.

    "The cold-blooded animals are all feeble breathers, and the most energetic breathers are the warmest-blooded. A mollusc, a fish, a frog, a quadruped, and a bird, represent the various stages of this correspondence."

  2. 2
    Passionate. idiomatic

    "Claire jumped from her chair and smiled the warmest-blooded smile that she could muster."

Adjective
  1. 1
    having warm blood (in animals whose body temperature is internally regulated) wordnet

Synonyms

All synonyms
endothermichomeothermichot bloodedhot-blooded

Example

More examples

"Birds and mammals are warm-blooded animals because they can keep their body temperatures constant regardless of the surrounding temperatures."

Etymology

From warm + blooded.

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.