Definition of chemoautotroph in English:


Line breaks: chemo|auto|troph
Pronunciation: /ˌkiːməʊˈɔːtətrəʊf
, -trɒf, ˌkɛm-/


An organism, typically a bacterium, which derives energy from the oxidation of inorganic compounds.
More example sentences
  • These so-called chemoautotrophs use the stored energy of certain chemicals [usually sulfides such as hydrogen sulfide or iron sulfide (FeS 2)] to drive chemosynthesis.
  • The reaction pathways that these chemoautotrophs employ involve the reduction of inorganic carbon compounds to form organic compounds, which include their biomolecules.
  • While chemoautotrophs are uncommon, photoautotrophs are common and quite diverse.



Pronunciation: /-ˈtrəʊfɪk, -ˈtrɒfɪk/
More example sentences
  • These resemble the foot of some specialized bivalves (Solemya or Lucina) used to penetrate putrid sediment to release H 2 S consumed by symbiotic chemoautotrophic bacteria.
  • They evolved towards sessile life possibly in symbiosis with photo- or chemoautotrophic microorganisms.
  • ‘Our synthesis of ammonia may serve as a model for a primordial nitrogen fixing system and conforms well with theories of the chemoautotrophic origin of life,’ say the researchers.


Pronunciation: /-ˈtrəʊfi, -ˈtrɒfi/
More example sentences
  • Nitrifying bacteria are capable of chemoautotrophy.
  • In anoxic bank sediments, respiration was also much greater than chemoautotrophy, but was entirely anaerobic.

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