Mitochondrion

Origin

From Ancient Greek μίτος (mitos, "thread") + χονδρίον, diminutive of χόνδρος (chondros, "grain, morsel")

Full definition of mitochondrion

Noun

1. (cytology) A spherical or ovoid organelle found in the cytoplasm of eukaryotic cells, contains genetic material separate from that of the host; it is responsible for the conversion of food to usable energy in the form of ATP.