Learn how to say Mitochondrion correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word mitochondrion:
noun (plural mitochondria /-rɪə/)
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).
early 20th century: modern Latin, from Greek mitos ‘thread’ + khondrion (diminutive of khondros ‘granule’)