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mitochondrion Line breaks: mito|chon¦drion
Pronunciation: /ˌmʌɪtə(ʊ)ˈkɒndrɪən/

Definition of mitochondrion in English:

noun (plural mitochondria ˌmʌɪtə(ʊ)ˈkɒndrɪə)

An organelle found in large numbers in most cells, in which the biochemical processes of respiration and energy production occur. It has a double membrane, the inner part being folded inwards to form layers (cristae).
Example sentences
  • Chloroplasts are cell organelles comparable to the mitochondria of animal cells.
  • Inside the cytoplasm are mitochondria and endoplasmic reticulum.
  • The singlet oxygen damages cell membranes, mitochondria and cell nuclei.


Early 20th century: modern Latin, from Greek mitos 'thread' + khondrion (diminutive of khondros 'granule').

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