Englishfor English speakers
variable
Noun
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A variable is something that may not always be the same.
In life insurance, sex is an important variable because men generally die younger than women.
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A variable is something used in mathematics for an unknown value.
In "x = 1 + 2 +...n = ((1 + n) × n)÷2", x is the variable.
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A variable is something used in computer programming languages that stores data, such as a number or words.
variable
Adjective
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If something is variable, it changes often.
The temperature in the area is highly variable.
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If a group is variable, there are big differences between things in the group.
The expected height of children in 3rd grade is variable.
diaphragm
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noun
a mechanical device in a camera that controls size of aperture of the lens
the new cameras adjust the diaphragm automatically
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noun
(anatomy) a muscular partition separating the abdominal and thoracic cavities; functions in respiration
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noun
electro-acoustic transducer that vibrates to receive or produce sound waves
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noun
a contraceptive device consisting of a flexible dome-shaped cup made of rubber or plastic; it is filled with spermicide and fitted over the uterine cervix