Source : Webster's Revised Unabridged Dictionary (1913)

Chemosynthesis \Chem`o*syn"the*sis\, n. [Chemical + synthesis.]
   (Plant Physiol.)
   Synthesis of organic compounds by energy derived from
   chemical changes or reactions. Chemosynthesis of
   carbohydrates occurs in the nitrite bacteria through the
   oxidation of ammonia to nitrous acid, and in the nitrate
   bacteria through the conversion of nitrous into nitric acid.
   -- {Chem`o*syn*thet"ic}, a.

Source : WordNet®

chemosynthesis
     n : synthesis of carbohydrate from carbon dioxide and water;
         limited to certain bacteria and fungi