[1] : The Collaborative International Dictionary of English v.0.48

soda \so"da\, n. it., soda, in oit., ashes used in making
   glass, fr. l. solida, fem. of solidus solid; solida having
   probably been a name of glasswort. see solid.
   1. chem.
      a sodium oxide or hydroxide.
      b popularly, sodium carbonate or bicarbonate. sodium
          bicarbonate is also called baking soda
          1913 webster

   2. same as sodium, used in terms such as bicarbonate of
      soda.
      pjc

   3. same as soda water.
      pjc

   4. a non-alcoholic beverage, sweetened by various means,
      containing flavoring and supersaturated with carbon
      dioxide, so as to be effervescent when the container is
      opened; -- in different localities it is variously called
      also soda pop, pop, mineral water, and minerals.
      it has many variants. the sweetening agent may be natural,
      such as cane sugar or corn syrup, or artificial, such as
      saccharin or aspartame. the flavoring varies widely,
      popular variants being fruit or cola flavoring.
      pjc

   caustic soda, sodium hydroxide.

   cooking soda, sodium bicarbonate. colloq.

   sal soda. see sodium carbonate, under sodium.

   soda alum min., a mineral consisting of the hydrous
      sulphate of alumina and soda.

   soda ash, crude sodium carbonate; -- so called because
      formerly obtained from the ashes of sea plants and certain
      other plants, as saltwort salsola. see under sodium.
      

   soda fountain, an apparatus for drawing soda water, fitted
      with delivery tube, faucets, etc.

   soda lye, a lye consisting essentially of a solution of
      sodium hydroxide, used in soap making.

   soda niter. see nitratine.

   soda salts, salts having sodium for the base; specifically,
      sodium sulphate or glauber's salts.

   soda waste, the waste material, consisting chiefly of
      calcium hydroxide and sulphide, which accumulates as a
      useless residue or side product in the ordinary leblanc
      process of soda manufacture; -- called also alkali
      waste.

   washing soda, sodium carbonate. colloq.
      1913 webster
see also:
solid baking soda sodium bicarbonate of soda soda water soda pop 
pop mineral water minerals caustic soda cooking soda 
sal soda sodium carbonate sodium soda alum soda ash 
salsola soda fountain soda lye soda niter nitratine 
soda salts soda waste alkali waste washing soda 

[2] : The Collaborative International Dictionary of English v.0.48

sodium bicarbonate \sodium bicarbonate\,
   a white crystalline substance, hnaco3, with a slight
   alkaline taste resembling that of sodium carbonate. it is
   found in many mineral springs and also produced
   artificially,. it is used in cookery, in baking powders, and
   as a source of carbonic acid gas carbon dioxide for soda
   water. called also baking soda, cooking soda,
   bicarbonate of soda, bicarb, saleratus, and
   technically, acid sodium carbonate, sodium acid
   carbonate, primary sodium carbonate, sodium dicarbonate,
   etc.
   1913 webster
see also:
hnaco3 baking soda cooking soda bicarbonate of soda bicarb saleratus 
acid sodium carbonate sodium acid carbonate primary sodium carbonate sodium dicarbonate 

[3] : WordNet (r) 2.0

baking soda
     n : a white soluble compound nahco3 used in effervescent
         drinks and in baking powders and as an antacid syn: bicarbonate
         of soda, sodium hydrogen carbonate, sodium
         bicarbonate, saleratus
see also:
bicarbonate of soda sodium hydrogen carbonate sodium bicarbonate saleratus 

Baking Soda >> B Words
Baking Soda, definition of term: Baking Soda
baking+soda_pag1.html

Soda >> S Words
Soda, definition of term: Soda
soda_pag1.html

Baking >> B Words
Baking, definition of term: Baking
baking_pag1.html

Soda Pop >> S Words
Soda Pop, definition of term: Soda Pop
soda+pop_pag1.html

Soda Ash >> S Words
Soda Ash, definition of term: Soda Ash
soda+ash_pag1.html

Baking Powder >> B Words
Baking Powder, definition of term: Baking Powder
baking+powder_pag1.html

Washing Soda >> W Words
Washing Soda, definition of term: Washing Soda
washing+soda_pag1.html

Caustic Soda >> C Words
Caustic Soda, definition of term: Caustic Soda
caustic+soda_pag1.html