blood heat

American  

noun

1. the normal temperature of human blood, being about 98.6°F (37°C).

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blood heat British  

noun

1. the normal temperature of the human body, 98.4°F or 37°C

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Etymology

Origin of blood heat

First recorded in 1805–15

Example Sentences

"I slowly learned that plays work best if you let them have some blood heat, and not simply be exciting exchanges of witty ideas," he told Joan Bakewell in a revealing interview in 2002.

From BBC • Nov. 29, 2025

The mixture is kept at blood heat for two hours and then left at room temperature overnight.

From Time Magazine Archive

The fungus does not seem to make the birds sick, perhaps because their blood heat is too high, but they drop it all over the place in their excreta.

From Time Magazine Archive

A glass cylinder filled with water at blood heat is often attacked by swarms of hungry mosquitoes.

From Time Magazine Archive

The decoction cooled rapidly in the thin air, and as soon as it was at blood heat, she poured it carefully into a metal beaker and carried it to the rear of the cave.

From "The Amber Spyglass" by Philip Pullman