na

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Related to Avogadro's number: Avogadro's constant

NA

The two-character ISO 3166 country code for NAMIBIA.

na

Used in bond transaction tables in newspapers to indicate a bond that trades on a nonaccrual basis (that is, on the basis of no obligation to repay any back interest owed).
References in periodicals archive ?
Now, Hahnemann formulated his ideas and did not know about Avogadro or Avogadro's number, which is the basis of the dilutional limit.
where N is Avogadro's number, a is the molecular surface area of the probe, and [[gamma].
where fo and F are the correction factors, y is the surface tension, NA is Avogadro's number, kB is Boltzmann's constant, T is the temperature, PD is the bubble pressure, and Pc is the pressure of polymer matrix.