Definition of mitochondrion
: any of various round or long cellular organelles of most eukaryotes that are found outside the nucleus, produce energy for the cell through cellular respiration, and are rich in fats, proteins, and enzymes — see cell illustration
mitochondrialplay \-drē-əl\ adjective
Recent Examples of mitochondrion from the Web
Over time, this human-like nuclear DNA disappeared in the Neanderthal genes, but the human mDNA dominated the gene pool, pushing out the original Neanderthal mitochondria and eventually completely replaced it.
Mitochondria are organelles that contain their own DNA.
Compared to sugar, fat is burned more efficiently by the energy-producing component of the cell known as the mitochondria.
Stressed cells release ATP and other molecules made by mitochondria into the extracellular space through channels in the cell membrane.
The proportion of diseased mitochondria to healthy ones causes the diseases to vary in severity.
The vast majority of your 20,000 genes are found in the nucleus of each of your cells, which contains DNA from both your parents, but mitochondria have their own genome, which carries only about 37 genes and is inherited from your mother alone.
The donor, who does not have mitochondrial disease, will pass on her healthy mitochondria.
This is the first eukaryote — organisms, like plants and animals, whose cells contain distinct nuclei — found without the machinery of mitochondria.
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Origin and Etymology of mitochondrion
New Latin, from Greek mitos thread + chondrion, diminutive of chondros grain
First Known Use: 1901See Words from the same year
MITOCHONDRION Defined for Kids
Definition of mitochondrion for Students
: one of the parts found in the cytoplasm of a cell outside the nucleus that provides the cell with energy released from the breakdown of nutrients
Medical Definition of mitochondrion
: any of various round or long cellular organelles of most eukaryotes that are found outside the nucleus, produce energy for the cell through cellular respiration, and are rich in fats, proteins, and enzymes—called also chondriosome
Learn More about mitochondrion
Britannica.com: Encyclopedia article about mitochondrion
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