(?), n. [Abbrev. from unity.] 1.
A single thing or person.
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2. (Arith.)
The least whole number; one.
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-Units are the integral parts of any large number. I. Watts.
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3.
A gold coin of the reign of James I., of the value of twenty shillings. Camden.
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4.
Any determinate amount or quantity (as of length, time, heat, value) adopted as a standard of measurement for other amounts or quantities of the same kind.
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5. (Math.)
A single thing, as a magnitude or number, regarded as an undivided whole.
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Abstract unit, the unit of numeration; one taken in the abstract; the number represented by 1. The term is used in distinction from concrete, or determinate, unit, that is, a unit in which the kind of thing is expressed; a unit of measure or value; as 1 foot, 1 dollar, 1 pound, and the like. -- Complex unit (Theory of Numbers), an imaginary number of the form a + b-1, when a2 + b2 = 1. -- Duodecimal unit, a unit in the scale of numbers increasing or decreasing by twelves. -- Fractional unit, the unit of a fraction; the reciprocal of the denominator; thus,
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