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From Biology-Online Dictionary | Biology-Online Dictionary
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1. Having much sensible heat; exciting the feeling of warmth in a great degree; very warm; opposed to cold, and exceeding warm in degree; as, a hot stove; hot water or air. A hotvenison pasty.

2. Characterised by heat, ardor, or animation; easily excited; firely; vehement; passionate; violent; eager. Achilles is impatient, hot, and revengeful. (Dryden) There was mouthing in hot haste. (Byron)

3. Lustful; lewd; lecherous.

4. Acrid; biting; pungent; as, hot as mustard. Hot bed, an iron platform in a rolling mill, on which hot bars, rails, etc, are laid to cool.

(Science: botany) hot wall, a receptacle for the hot water drawn from the condenser by the air pump. This water is returned to the boiler, being drawn from the hot well by the feed pump. In hot water (Fig), in trouble; in difficulties.

Synonym: burning, fiery, fervid, glowing, eager, animated, brisk, vehement, precipitate, violent, furious, ardent, fervent, impetuous, irascible, passionate, hasty, excitable.

Origin: oe. Hot, hat, as. Hat; akin to os. Het, D. Heet, OHG. Heiz, g. Heiss, Icel. Heitr, Sw. Het, dan. Heed, hed; cf. Goth. Heito fever, hais torch. Cf. Heat.