1. sodium hydrogen carbonate

noun. A white soluble compound (NaHCO3) used in effervescent drinks and in baking powders and as an antacid.
Synonyms
saleratus hydrogen carbonate bicarbonate baking soda sodium bicarbonate bicarbonate of soda
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2. sodium-vapour lamp

noun. Lamp in which an electric current passed through a tube of sodium vapor makes a yellow light; used is street lighting.
Synonyms
sodium-vapor lamp lamp

3. sodium-vapor lamp

noun. Lamp in which an electric current passed through a tube of sodium vapor makes a yellow light; used is street lighting.
Synonyms
sodium-vapour lamp lamp

4. hydrogen-bomb

verb. Attack with a hydrogen bomb.
Synonyms
bombard bomb
Antonyms
defend dumb bomb smart bomb

5. carbonate

noun. (ˈkɑːrbəˌneɪt) A salt or ester of carbonic acid (containing the anion CO3).
Synonyms
salt calcium carbonate Lithane ammonium carbonate lithium carbonate bicarbonate magnesium carbonate Eskalith Lithonate hydrogen carbonate potassium carbonate
Antonyms
dull decrease irreversible process increase devolution
Etymology
carbonate (English)
carbonate (French)
carbonatem (Latin)
carbo (Latin)

6. carbonate

verb. (ˈkɑːrbəˌneɪt) Turn into a carbonate.
Synonyms
change
Antonyms
stay evolution
Etymology
carbonate (English)
carbonate (French)
carbonatem (Latin)
carbo (Latin)

7. carbonate

verb. (ˈkɑːrbəˌneɪt) Treat with carbon dioxide.
Synonyms
process treat
Antonyms
increment reversible process decrement
Etymology
carbonate (English)
carbonate (French)
carbonatem (Latin)
carbo (Latin)

8. hydrogen

noun. (ˈhaɪdrədʒən) A nonmetallic univalent element that is normally a colorless and odorless highly flammable diatomic gas; the simplest and lightest and most abundant element in the universe.
Synonyms
atomic number 1 chemical element gas tritium H H2O water element
Antonyms
understate unleaded gasoline leaded gasoline defend fresh water
Etymology
hydrogen (English)
hydrogène (French)
-gène (French)
hydro- (French)
ὑδρο- (Ancient Greek (to 1453))

9. sodium

noun. (ˈsoʊdiːəm) 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).
Synonyms
halite saltwater metal seawater brine Na rock salt atomic number 11 metallic element
Antonyms
fresh water nonmetallic
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