mantissan.

Brit.

/manˈtɪsə/, U.S.

/mænˈtɪsə/

Origin: A borrowing from Latin. Etymon: Latin mantissa.

Etymology: < classical Latin mantissa, mantīsa, of doubtful meaning and unknown origin; said by the Latin grammarian Festus (as preserved in a later epitome) to be an Etruscan word meaning ‘makeweight’, elsewhere in classical Latin apparently meaning ‘sauce’, and ‘fuss or profit’. Found in two early 16th-cent. German glossaries, and thereafter as a common element in the titles of post-classical Latin books, especially by German authors or printed in Germany, from 1608 to the 19th cent, with the sense ‘supplement’. Sense 2a has been attributed to H. Briggs 1624, but appears in fact to have originated with J. Wallis in his Opera Math. (1693) II. x. 41, where the Latin word is used for the digits of a decimal number following the decimal point (in the English edition of his Algebra (1685) Wallis used ‘appendage’); the Latin word was used in relation spec. to the decimal part of a logarithm by L. Euler in his Introductio in Analysin Infinitorum (1748) I. vi. 83.

†1. An addition of comparatively small importance, esp. to a text or discourse; a supplement. Obsolete.

ΘΚΠ

society > leisure > the arts > literature > a written composition > parts of a written composition > [noun] > addition or appendix > of small importance

mantissa1641

1641 H. Maisterson Serm. 20 Trifles, which..should..as a mantissa or an overplus be cast in at their bargain.

1642 R. Cudworth Disc. Lords Supper i. 9 It will not be now amisse, if we adde as a Mantissa to that discourse, something of the Custom of the Heathens.

1671 R. McWard True Non-conformist 5 Spurning at the righteousnes of Jesus Christ, and aspiring to adde a Mantissa, an addition of your own, to his sole purchase.

1781 E. Darwin Let. 29 Sept. (1981) 112 Mr. Lightfoot advises the botanical society to introduce the plants in the Mantissa in their proper places.

a. Mathematics. The part of a logarithm after the decimal point. Cf. characteristic n. 2a.

ΘΚΠ

the world > relative properties > number > arithmetic or algebraic operations > logarithm > [noun] > numerical elements

characteristic1654

index1678

exponent1734

modulus1753

base1772

mantissa1846

M1890

1846 J. W. Kavanagh Arithm. (ed. 2) 217 The decimal part [of a logarithm] is sometimes, but more frequently in old treatises, termed the mantissa (over-weight) of the logarithm.

c1865 J. Wylde Circle of Sci. I. 519/1 The decimal part of a logarithm is called the mantissa: the whole number is called the characteristic.

1917 Biometrika 11 376 Degen gives the logarithms of the factorials..to eighteen mantissa figures.

1941 C. D. Hodgman Math. Tables from Handbk. Chem. & Physics (ed. 7) 1 A common logarithm, in general, consists of an integer which is called the characteristic and an endless decimal, the mantissa.

1961 L. J. Comrie Chambers's Shorter Six-figure Math. Tables p. xii/1 When logarithms are taken to base 10..it is advantageous to keep the mantissa positive.

1989 W. Gellert et al. VNR Conc. Encycl. Math. (ed. 2) ii. ii. 58 Having found that lg 2.37 = 0.3747 one has at the same time the common logarithms of the numbers 23.7, 2370, 0.237, 0.00237, etc... The actual digits 3747 to be calculated for a logarithm are called its mantissa, and the integer before the decimal point its characteristic.

b. Computing. A number, usually of a fixed number of digits and between 0 and 1, by which a power of the base (e.g. 2 or 10) is multiplied to represent a number in floating-point representation.

ΘΚΠ

society > computing and information technology > [noun] > numerical representation > mantissa

mantissa1959

significand1967

1959 M. H. Wrubel Primer of Programming for Digital Computers ii. 19 The second representation employs a mantissa, containing the significant digits, multiplied by 10 raised to a power.

1960 M. G. Say et al. Analogue & Digital Computers v. 142 After multiplication has been completed the digit following the binary point must be examined and, if this digit is 0, a corrective shift must be applied to the mantissa together with an adjustment of the exponent.

1979 Sci. Amer. Dec. 87/3 In most computers the decimal point in the mantissa of a floating-point number is by convention placed at the far left, so that the number 3.24 × 10⁶ would be represented in floating-point form as .324 × 10⁷, or the pair of numbers 7, 324.

1985 Pract. Computing Aug. 102/4 Single-precision variables use a three-byte mantissa and a one-byte exponent.

This entry has been updated (OED Third Edition, September 2000; most recently modified version published online March 2022).

单词	mantissa
释义	mantissan. Brit. /manˈtɪsə/, U.S. /mænˈtɪsə/ Origin: A borrowing from Latin. Etymon: Latin mantissa. Etymology: < classical Latin mantissa, mantīsa, of doubtful meaning and unknown origin; said by the Latin grammarian Festus (as preserved in a later epitome) to be an Etruscan word meaning ‘makeweight’, elsewhere in classical Latin apparently meaning ‘sauce’, and ‘fuss or profit’. Found in two early 16th-cent. German glossaries, and thereafter as a common element in the titles of post-classical Latin books, especially by German authors or printed in Germany, from 1608 to the 19th cent, with the sense ‘supplement’. Sense 2a has been attributed to H. Briggs 1624, but appears in fact to have originated with J. Wallis in his Opera Math. (1693) II. x. 41, where the Latin word is used for the digits of a decimal number following the decimal point (in the English edition of his Algebra (1685) Wallis used ‘appendage’); the Latin word was used in relation spec. to the decimal part of a logarithm by L. Euler in his Introductio in Analysin Infinitorum (1748) I. vi. 83. †1. An addition of comparatively small importance, esp. to a text or discourse; a supplement. Obsolete. ΘΚΠ society > leisure > the arts > literature > a written composition > parts of a written composition > [noun] > addition or appendix > of small importance mantissa1641 1641 H. Maisterson Serm. 20 Trifles, which..should..as a mantissa or an overplus be cast in at their bargain. 1642 R. Cudworth Disc. Lords Supper i. 9 It will not be now amisse, if we adde as a Mantissa to that discourse, something of the Custom of the Heathens. 1671 R. McWard True Non-conformist 5 Spurning at the righteousnes of Jesus Christ, and aspiring to adde a Mantissa, an addition of your own, to his sole purchase. 1781 E. Darwin Let. 29 Sept. (1981) 112 Mr. Lightfoot advises the botanical society to introduce the plants in the Mantissa in their proper places. 2. a. Mathematics. The part of a logarithm after the decimal point. Cf. characteristic n. 2a. ΘΚΠ the world > relative properties > number > arithmetic or algebraic operations > logarithm > [noun] > numerical elements characteristic1654 index1678 exponent1734 modulus1753 base1772 mantissa1846 M1890 1846 J. W. Kavanagh Arithm. (ed. 2) 217 The decimal part [of a logarithm] is sometimes, but more frequently in old treatises, termed the mantissa (over-weight) of the logarithm. c1865 J. Wylde Circle of Sci. I. 519/1 The decimal part of a logarithm is called the mantissa: the whole number is called the characteristic. 1917 Biometrika 11 376 Degen gives the logarithms of the factorials..to eighteen mantissa figures. 1941 C. D. Hodgman Math. Tables from Handbk. Chem. & Physics (ed. 7) 1 A common logarithm, in general, consists of an integer which is called the characteristic and an endless decimal, the mantissa. 1961 L. J. Comrie Chambers's Shorter Six-figure Math. Tables p. xii/1 When logarithms are taken to base 10..it is advantageous to keep the mantissa positive. 1989 W. Gellert et al. VNR Conc. Encycl. Math. (ed. 2) ii. ii. 58 Having found that lg 2.37 = 0.3747 one has at the same time the common logarithms of the numbers 23.7, 2370, 0.237, 0.00237, etc... The actual digits 3747 to be calculated for a logarithm are called its mantissa, and the integer before the decimal point its characteristic. b. Computing. A number, usually of a fixed number of digits and between 0 and 1, by which a power of the base (e.g. 2 or 10) is multiplied to represent a number in floating-point representation. ΘΚΠ society > computing and information technology > [noun] > numerical representation > mantissa mantissa1959 significand1967 1959 M. H. Wrubel Primer of Programming for Digital Computers ii. 19 The second representation employs a mantissa, containing the significant digits, multiplied by 10 raised to a power. 1960 M. G. Say et al. Analogue & Digital Computers v. 142 After multiplication has been completed the digit following the binary point must be examined and, if this digit is 0, a corrective shift must be applied to the mantissa together with an adjustment of the exponent. 1979 Sci. Amer. Dec. 87/3 In most computers the decimal point in the mantissa of a floating-point number is by convention placed at the far left, so that the number 3.24 × 10⁶ would be represented in floating-point form as .324 × 10⁷, or the pair of numbers 7, 324. 1985 Pract. Computing Aug. 102/4 Single-precision variables use a three-byte mantissa and a one-byte exponent. This entry has been updated (OED Third Edition, September 2000; most recently modified version published online March 2022). < n.1641
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