Lithotrophs are a diverse group of organisms using inorganic substrate (usually of mineral origin) to obtain reducing equivalents for use in biosynthesis (e.g., carbon dioxide fixation) or energy conservation (i.e., ATP production) via aerobic or anaerobic respiration. Known chemolithotrophs are exclusively microbes; no known macrofauna possesses ... Found on http://en.wikipedia.org/wiki/Lithotroph
(from the article `nutrition`) ...inorganic or organic compounds to supply their energy requirements. If the electron-donor materials utilized to form reduced coenzymes consist of ... Found on http://www.britannica.com/eb/a-z/l/59
<cell biology> Cell or organism that depends upon inorganic compounds as electron donors for energy production. ... (18 Nov 1997) ... Found on http://www.encyclo.co.uk/local/20973