Part 765

6. A violent action unintermitted; a single effort; a single course in a race that consists of two or more courses; as, he won two heats out of three.

Many causes . . . for refreshment betwixt the heats.

Dryden.

struck off at one heat the matchless tale of "Tam o' Shanter."

J. C. Shairp.

7. Utmost violence; rage; vehemence; as, the heat of battle or party. "The heat of their division." Shak.

8. Agitation of mind; inflammation or excitement; exasperation. "The heat and hurry of his rage." South.

9. Animation, as in discourse; ardor; fervency.

With all the strength and heat of eloquence.

Addison.

10. Sexual excitement in animals.

11. Fermentation.

Animal heat, Blood heat, Capacity for heat, etc. See under Animal, Blood, etc. -- Atomic heat (Chem.), the product obtained by multiplying the atomic weight of any element by its specific heat. The atomic heat of all solid elements is nearly a constant, the mean value being 6.4. -- Dynamical theory of heat, that theory of heat which assumes it to be, not a peculiar kind of matter, but a peculiar motion of the ultimate particles of matter. Heat engine, any apparatus by which a heated substance, as a heated fluid, is made to perform work by giving motion to mechanism, as a hot-air engine, or a steam engine. -- Heat producers. (Physiol.) See under Food. -- Heat rays, a term formerly applied to the rays near the red end of the spectrum, whether within or beyond the visible spectrum. -- Heat weight (Mech.), the product of any quantity of heat by the mechanical equivalent of heat divided by the absolute temperature; -- called also thermodynamic function, and entropy. -- Mechanical equivalent of heat. See under Equivalent. -- Specific heat of a substance (at any temperature), the number of units of heat required to raise the temperature of a unit mass of the substance at that temperature one degree. -- Unit of heat, the quantity of heat required to raise, by one degree, the temperature of a unit mass of water, initially at a certain standard temperature. The temperature usually employed is that of 0∞ Centigrade, or 32∞ Fahrenheit.

Heat (ht), v. t. [imp. & p. p. Heated; p. pr. & vb. n. Heating.] [OE. heten, AS. htan, fr. ht hot. See Hot.] 1. To make hot; to communicate heat to, or cause to grow warm; as, to heat an oven or furnace, an iron, or the like.

Heat me these irons hot.

Shak.

2. To excite or make hot by action or emotion; to make feverish.

Pray, walk softly; do not heat your blood.

Shak.

3. To excite ardor in; to rouse to action; to excite to excess; to inflame, as the passions.

A noble emulation heats your breast.

Dryden.

Heat, v. i. 1. To grow warm or hot by the action of fire or friction, etc., or the communication of heat; as, the iron or the water heats slowly.

2. To grow warm or hot by fermentation, or the development of heat by chemical action; as, green hay heats in a mow, and manure in the dunghill.

Heat (ht), imp. & p. p. of Heat. Heated; as, the iron though heat red- hot. [Obs. or Archaic] Shak.

Heat"er (ht"r), n. 1. One who, or that which, heats.

2. Any contrivance or implement, as a furnace, stove, or other heated body or vessel, etc., used to impart heat to something, or to contain something to be heated.

Feed heater. See under Feed.