A harmonic balancer sounds like a crucial part on a spaceship in some pulpy 1950s sci-fi story, or something you need so you can play music with hobos when you're ridin' the rails. However, it's actually an important part on your engine that helps your crankshaft last as long as possible.
U.S. National Library of Medicine (5.00 / 1 vote) Rate this definition: Mitochondria. Semiautonomous, self-reproducing organelles that occur in the cytoplasm of all cells of most, but not all, eukaryotes. Each mitochondrion is surrounded by a double limiting membrane. The inner membrane is highly invaginated, and its projections are called cristae.
noun (plural mitochondria ËmÊÉªtÉ(Ê)ËkÉndrÉªÉ). 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. 1  Chloroplasts are cell organelles comparable to the mitochondria of animal cells. Chloroplasts are cell organelles comparable to the mitochondria of animal cells. 2  Inside the cytoplasm are mitochondria and endoplasmic reticulum. 3  The singlet oxygen damages cell membranes, mitochondria and cell nuclei.