blood heat

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

Origin of blood heat

First recorded in 1805–15

When wanted to use, heat a quart of milk to blood-heat, and put it in the dish in which it is to remain.

The Cookery Blue Book |Society for Christian Work of the First Unitarian Church, San Francisco, California
It is a well established fact that digestion will not go on when the temperature of the stomach is below that of blood-heat.

Hints on cheese-making |Thomas Day Curtis
I then add as much warm water, at blood-heat, as will mix it into a stiff batter.

Roughing it in the Bush |Susanna Moodie
Its temperature was blood-heat, its air heavy and nauseating with the odours of ink, moist paper and oil, its lights dim.

The Great God Success |John Graham (David Graham Phillips)

That was the end of the story, and it stirred those boys to blood-heat, be sure of it.

A Double Barrelled Detective Story |Mark Twain

blood heat

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

blood heat

The normal temperature (about 37.0°C or 98.6°F) of human blood.