| adj. 1.  a.  Of or occurring in the Temperate Zone: temperate regions; temperate species. b.  Characterized by moderate temperatures, weather, or climate; neither hot nor cold. 2.  a.  Moderate in degree or quality; restrained: temperate criticism. b.  Exercising moderation and self-restraint: learned to be temperate in eating and drinking. 3.  Biology   Of or relating to a virus that infects bacterial cells but rarely causes lysis: temperate bacteriophages. [Middle English temperat, from Latin temperātus, from past participle of temperāre, to temper; see  TEMPER.] temper·ate·ly adv. temper·ate·ness n. | 
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