NA

Pronunciation (US):

(GB):

IPA (US):

 Dictionary entry overview: What does Na mean? 

• NA (noun)
  The noun NA has 1 sense:

1. a silvery soft waxy metallic element of the alkali metal group; occurs abundantly in natural compounds (especially in salt water); burns with a yellow flame and reacts violently in water; occurs in sea water and in the mineral halite (rock salt)

  Familiarity information: NA used as a noun is very rare.

 Dictionary entry details 

• NA (noun)

Sense 1

Meaning:

A silvery soft waxy metallic element of the alkali metal group; occurs abundantly in natural compounds (especially in salt water); burns with a yellow flame and reacts violently in water; occurs in sea water and in the mineral halite (rock salt)

Classified under:

Nouns denoting substances

Synonyms:

atomic number 11; Na; sodium

Hypernyms ("Na" is a kind of...):

metal; metallic element (any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc.)

Holonyms ("Na" is a substance of...):

halite; rock salt (naturally occurring crystalline sodium chloride)

brine; saltwater; seawater (water containing salts)

 Context examples 

In addition, citicoline is involved in the preservation of sphingomyelin and cardiolipin and the restoration of Na+/K+-ATPase activity.

(Citicoline, NCI Thesaurus)

As a mineralocorticoid-receptor agonist, this agent stimulates Na+ reabsorption and water retention and K+ and H+ secretion in the distal tubules and collecting ducts of the kidney.

(Fludrocortisone Acetate, NCI Thesaurus)

Upon administration, oleandrin specifically binds to and inhibits the alpha3 subunit of the Na/K-ATPase pump in human cancer cells.

(Oleandrin, NCI Thesaurus)

Our correspondent naïvely says that even Ellen Terry could not be so winningly attractive as some of these grubby-faced little children pretend—and even imagine themselves—to be.

(Dracula, by Bram Stoker)

In addition, this agent inhibits protein kinase C (PKC) and is able to reverse vasoconstriction through the inhibition of PKC-mediated inhibition of Na/K-ATPase phosphorylation.

(Cicletanine, NCI Thesaurus)

Holmes laughed at the young giant’s naïve astonishment.

(The Return of Sherlock Holmes, by Sir Arthur Conan Doyle)

“Why, what can be worse than cutting our throats?” she asked, with pretty naïve surprise.

(The Sea-Wolf, by Jack London)

Activation of MR also leads to increased expression of Na+/K+-ATPase, thus causing a net increase in sodium uptake from the renal filtrate.

(Aldosterone-Regulated Sodium Reabsorption Pathway, NCI Thesaurus/KEGG)

ON 01910.Na is a type of protein kinase inhibitor and a type of benzyl styryl sulfone analog.

(ON 01910.Na, NCI Dictionary)

The enhanced excretion of Na+ produces diuresis ultimately resulting in a reduction in blood pressure without the loss of K+.

(Aldosterone Receptor Antagonist, NCI Thesaurus)