A′ër‐og″no‐sy (�), n. [Aëro- + Gr. � knowing, knowledge: cf. F. aérognosie.] The science which treats of the properties of the air, and of the part it plays in nature. Craig.
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Webster's Dictionary 1913
Webster's Revised Unabridged Dictionary, C. & G. Merriam Co., 1913.