minus-plus sign

minus-plus sign
the symbol ∓, meaning "minus or plus", used alongside the plus-minus sign to show that a negative value is to be taken where the positive value is indicated by the plus-minus sign, and vice versa (as in (x ± 1) / (x ∓ 2), which means (x + 1) / (x - 2) and (x - 1) / (x + 2)).

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  • Plus sign — Plus Plus, a. [L., more; akin to Gr. ?, ?, and E. full. See {Full}, a., and cf. {Pi[ u]}, {Pleonasm}.] [1913 Webster] 1. (Math.) More, required to be added; positive, as distinguished from negative; opposed to {minus}. [1913 Webster] 2. Hence, in …   The Collaborative International Dictionary of English

  • Plus-minus sign — For other uses, see plus minus (disambiguation). ± The plus minus sign (±) is a mathematical symbol commonly used either to indicate the precision of an approximation, or to indicate a value that can be of either sign. The sign is normally… …   Wikipedia

  • sign — n. indication 1) to give, show a sign (he showed signs of advanced emphysema; they showed no signs of life) 2) an encouraging; sure, telltale, unmistakable sign 3) vital signs ( basic indications of life ) 4) a sign that + clause (there had been… …   Combinatory dictionary

  • minus sign — minus .sign also minus n a sign ( ) showing that a number is less than zero, or that the second of two numbers is to be ↑subtracted from the first →↑plus sign …   Dictionary of contemporary English

  • Sign — Sign, n. [F. signe, L. signum; cf. AS. segen, segn, a sign, standard, banner, also fr. L. signum. Cf. {Ensign}, {Resign}, {Seal} a stamp, {Signal}, {Signet}.] That by which anything is made known or represented; that which furnishes evidence; a… …   The Collaborative International Dictionary of English

  • Sign manual — Sign Sign, n. [F. signe, L. signum; cf. AS. segen, segn, a sign, standard, banner, also fr. L. signum. Cf. {Ensign}, {Resign}, {Seal} a stamp, {Signal}, {Signet}.] That by which anything is made known or represented; that which furnishes… …   The Collaborative International Dictionary of English

  • plus — [plus] prep. [L, more < IE * plēyos, compar. of * pelu , much < base * pel > FULL1] 1. added to [2 plus 2 equals 4] 2. increased by; in addition to [salary plus bonus] 3. Informal with the addition of [he returned wiser and plus $300] …   English World dictionary

  • Plus — Plus, a. [L., more; akin to Gr. ?, ?, and E. full. See {Full}, a., and cf. {Pi[ u]}, {Pleonasm}.] [1913 Webster] 1. (Math.) More, required to be added; positive, as distinguished from negative; opposed to {minus}. [1913 Webster] 2. Hence, in a… …   The Collaborative International Dictionary of English

  • plus — 1570s, the oral rendering of the arithmetical sign +, from L. plus more (comparative of multus much ), altered by influence of minus from *pleos, from PIE *ple full (see POLY (Cf. poly )). Placed after a whole number to indicate and a little more …   Etymology dictionary

  • Plus and minus signs — This article is about the mathematical symbols. For other uses of plus , see Plus (disambiguation). For other uses of minus , see Minus (disambiguation). The plus and minus signs (+ and −) are mathematical symbols used to represent the notions of …   Wikipedia

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