the synthesis by certain bacteria of organic compounds from carbon dioxide and water by the use of energy obtained by the oxidation of certain chemicals, as hydrogen sulfide or ammonia
The synthesis of organic compounds by certain bacteria, especially in deep-sea hydrothermal vents, using energy obtained from the chemical oxidation of simple inorganic compounds. Chemosynthesis is thought to have been used by the first forms of life on Earth.
(usually uncountable, plural chemosyntheses)
chemo- + synthesis