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Meaning of trisomy, double helix, enantiomer, nitrogen balance, thorax, olefin, surfactant, acetominophen, leukemia, labor

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Meaning of trisomy (noun)
form plural: trisomies

a condition in which a chromosome is present in a triplet rather than a pair

Example
Down's syndrome is an example of a trisomy.

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Meaning of double helix (noun)
form plural: double helices

the double-stranded coiled structure of a DNA molecule

Example
Watson and Crick determined the double helix structure of DNA.

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Meaning of enantiomer (noun)
form plural: enantiomers

either one of a pair of chemical components whose molecular structures have a mirror-image relationship to each other

Example
Enantiomers are chiral objects being images which are not overlayed.

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Meaning of nitrogen balance (noun)
form: no plural

the relationship between the amount of nitrogen taken in and excreted by the body

Example
The nitrogen balance of the body tells us whether body tissue is being made or broken down i.e. whether the body is in an anabolic or a catabolic state.

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Meaning of thorax (noun)
form plural: thoraxes

area that contains the heart and lungs; the chest

Example
The diaphragm separates the thorax from the abdomen.

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Meaning of olefin (noun)
form plural: olefins

unsaturated open chain hydrocarbons possessing one or more double bonds

Example
Alkenes are also called olefins.

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Meaning of surfactant (noun)
form plural: surfactants

lipoprotein maintaining the stability of lung tissue

Example
Surfactant facilitates the gas exchange across the membranes.

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Meaning of acetominophen (noun)
form plural: acetaminophens

a painkiller

Example
Acetaminophen is a painkiller.

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Meaning of leukemia (noun)
form plural: leukemias

cancer of the white blood cells

Example
There are many types of leukemias that typically affect different age groups of the population.

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Meaning of labor (noun)
form plural: labors

the process of childbirth

Example
Labor is caused by muscular contractions of the uterus.

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