warm-blooded

adjective

warm-blood·​ed ˈwȯrm-ˈblə-dəd 

1

: having warm blood

specifically : having a relatively high and constant internally regulated body temperature relatively independent of the surroundings

2

: fervent or ardent in spirit

warm-bloodedness noun

Synonyms

• warm
• passionate
• passional
• fervent
• emotional

Examples of warm-blooded in a Sentence

a warm-blooded defense of everyone's right to free speech

Recent Examples on the Web

To be certain, more research is needed in other animal groups — including terrestrial animals, which can have complex external geometries such as feathers and hair, and warm-blooded, or endothermic, animals such as mammals and birds. —Quanta Magazine, 27 Oct. 2025

The New World screwworm is a parasitic fly that lays eggs in the open wounds of warm-blooded animals. —Lori Ann Larocco, CNBC, 21 Oct. 2025

When infrared radiation from a warm-blooded animal hits the membrane, specialized TRPA1 ion channels convert that thermal energy into electrical signals. —Kaif Shaikh, Interesting Engineering, 17 Oct. 2025

The parasite, a larva of the Cochliomyia hominivorax fly, attacks warm-blooded animals, including humans. —Peter Burke, FOXNews.com, 24 Sep. 2025

Word History

First Known Use

1793, in the meaning defined at sense 1

Rhymes for warm-blooded

• blooded
• budded
• flooded
• studded
• thudded

Kids Definition

warm-blooded

adjective

warm-blood·​ed

ˈwȯrm-ˈbləd-əd

1

: able to keep up a relatively high and constant body temperature that is mostly independent of that of the surrounding environment

birds and mammals are warm-blooded

2

: warm in feeling

warm-bloodedness noun

Medical Definition

warm-blooded

adjective

warm-blood·​ed ˈwȯrm-ˈbləd-əd 

: having warm blood

specifically : having a relatively high and constant body temperature relatively independent of the surroundings

warm-bloodedness noun