Dictionary![]() ![]() naPronunciation: (nä, nu), [key] Chiefly Scot. —adv. 1. no. 2. not; in no way; by no means. —conj. nor; neither. NA1. not applicable. 2. not available. Na—Symbol, Chem. sodium. n/a1. no account. 2. not applicable. N.A.1. National Army. 2. North America. 3. not applicable. 4. Micros.See numerical aperture. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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