| psychrometer | An instrument for measuring the tension of the aqueous vapor in the atmosphere, being essentially a wet and dry bulb hygrometer. Origin: Gr. Psychros cold: cf. F. Psychrometre. Source: Websters Dictionary (01 Mar 1998) |
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| sling psychrometer | Wet and dry bulb thermometers mounted on a hand sling, for use when a small portable psychrometer is required. (05 Mar 2000) |
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