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na

 - 23 dictionary results

na

  [nah, nuh] Chiefly Scot.
Use na in a Sentence
–adverb
1. no.
2. not; in no way; by no means.
–conjunction
3. nor; neither.
Origin:
bef. 900; ME (north and Scots); in part repr. OE nā (n(e) not, nor + ā ever; cf. ay 1 ); in part var. of ne; cf. no 1

NA

 
1. not applicable.
2. not available.

Na

 
Symbol, Chemistry.
sodium.
Origin:
< NL natrium

n/a

 
1. no account.
2. not applicable.

N.A.

 
1. National Army.
2. North America.
3. not applicable.
4. Microscopy. numerical aperture.

numerical aperture

 
–noun Microscopy.
a measure of the resolving power of a microscope, equal to the index of refraction of the medium in which the object is placed multiplied by the sine of the angle made with the axis by the most oblique ray entering the instrument, the resolving power increasing as the product increases. Abbreviation: N.A.
Origin:
1875–80
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
Cite This Source Link To na
Na 1  
The symbol for the element sodium.

[From New Latin natrium, from French natron, natron; see natron.]
Na 2  
abbr.   Bible
Nahum
NA  
abbr.  

  1. North America

  2. also n/a not applicable

Na·hum 2   (nā'həm, nā'əm)   
n.   Abbr. Nah. or Na
See Table at Bible.

[After Nahum.]
so·di·um   (sō'dē-əm)   
n.   Symbol Na
A soft, light, extremely malleable silver-white metallic element that reacts explosively with water, is naturally abundant in combined forms, especially in common salt, and is used in the production of a wide variety of industrially important compounds. Atomic number 11; atomic weight 22.99; melting point 97.8°C; boiling point 892°C; specific gravity 0.971; valence 1. See Table at element.

[sod(a) + -ium.]
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
Cite This Source
Financial Dictionary

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).

Wall Street Words: An A to Z Guide to Investment Terms by David L. Scott.
Copyright © 2003. Published by Houghton Mifflin.
Cite This Source
Medical Dictionary

Main Entry: Na
Function: symbol
sodium

Main Entry: NA
Function: abbreviation
1 Nomina Anatomica
2 numerical aperture
3 nurse's aide

Main Entry: nu·mer·i·cal aperture
Pronunciation: n(y)u-'mer-i-k&l-
Function: noun
: a number that indicates the resolving power of amicroscope objective and is equal to the product of the index of refraction of the medium (as immersion oil) in front of the objective and the sine of half the angle formed by two rays emanating fromthe object upon which the microscope is focused and entering the objective at either end of a diameter of the objective
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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Medical Dictionary

Na
The symbol for the element sodium.

NA abbr.
Nomina Anatomica (official system for anatomical nomenclature)

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Cite This Source
Science Dictionary
Na  
The symbol for sodium.
sodium   (sō'dē-əm)  Pronunciation Key 
Symbol Na
A soft, lightweight, silvery-white metallic element of the alkali group that reacts explosively with water. It is the most abundant alkali metal on Earth, occurring especially in common salt. Sodium is very malleable, and its compounds have many important uses in industry. Atomic number 11; atomic weight 22.99; melting point 97.8°C; boiling point 892°C; specific gravity 0.971; valence 1. See Periodic Table.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source
Computing Dictionary

na networking
The country code for Namibia.
(1999-01-27)

The Free On-line Dictionary of Computing, © 1993-2007 Denis Howe
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Abbreviations & Acronyms
na
Nauru
Na

  1. Nahum

  2. sodium

NA

  1. Narcotics Anonymous

  2. Native American (as in personal ads)

  3. Netherlands Antilles (international vehicle ID)

  4. not allowed

  5. not applicable

  6. not available

The American Heritage® Abbreviations Dictionary, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
Cite This Source
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