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a combining form meaning “air,” used in the formation of compound words:
combining form
air or vapour: atmometer, atmosphere

atmo- pref.
Steam; vapor: atmosphere.


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  • Atlantes

    plural of (def 5). a bound collection of maps. a bound volume of charts, plates, or tables illustrating any subject. Anatomy. the first cervical vertebra, which supports the head. a size of drawing or writing paper, 26 × 34 or 33 inches. Also called telamon. Architecture. a sculptural figure of a man used as a […]

  • Atlantean

    pertaining to the demigod Atlas. having the strength of Atlas: He was of monumental girth and Atlantean power. pertaining to Atlantis. Historical Examples He recalled feeding the five remaining cartridges into the magazine, then clapping on an Atlantean noble’s helmet. Astounding Stories, February, 1931 Various There was a sharp question from the Atlantean who had […]

  • Atmometer

    an instrument for measuring the rate at which water evaporates. Historical Examples atmometer, at-mom′e-tėr, n. an instrument for measuring the rate of evaporation from a moist surface. Chambers’s Twentieth Century Dictionary (part 1 of 4: A-D) Various atmometer, an instrument for measuring the amount of evaporation from a moist surface in a given time. The […]

  • Atmolysis

    a process for separating gases or vapors of different molecular weights by transmission through a porous substance. Historical Examples By this means (“atmolysis”) he was enabled partially to separate oxygen from air. Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 3 Various noun (pl) -ses (-ˌsiːz) a method of separating gases that depends on their differential […]

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