mantissa

[man-tis-uh]

noun

Mathematics. the decimal part of a common logarithm.Compare characteristic(def 3a).

Obsolete. an addition of little or no importance, as to a literary work.

Origin of mantissa

1860–65; < Latin, variant of mantisa addition, makeweight, said to be from Etruscan; logarithmic mantissa so called because it is additional to the characteristic or integral part (term introduced by H. Briggs)

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for mantissa

The integral part of a logarithm is called the index or characteristic, and the fractional part the mantissa.
Encyclopaedia Britannica, 11th Edition, Volume 16, Slice 8|Various
Linnæus has described this plant minutely in his Mantissa Plant, so that no doubt remains of its being his maritimus.
The Botanical Magazine, Vol. V|William Curtis
Linnæus, however, says that his plant came from India (Mantissa, p. 273).
Origin of Cultivated Plants|Alphonse De Candolle
Mantissa Plantarum, generum editionis sextæ et specierum editionis secundæ.
Lives of Eminent Zoologists, from Aristotle to Linnus|William MacGillivray

These features fairly enough suit the Mitra filosa, generally, and with reason, supposed to be the V. filaris of the 'Mantissa.'
The Journal of the Proceedings of the Linnean Society - Vol. 4|Various

British Dictionary definitions for mantissa

mantissa

noun

the fractional part of a common logarithm representing the digits of the associated number but not its magnitudethe mantissa of 2.4771 is .4771 Compare characteristic (def. 2a)

Word Origin for mantissa

C17: from Latin: something added, of Etruscan origin

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for mantissa

decimal part of a logarithm, 1865, from Latin mantisa "a worthless addition, makeweight," perhaps a Gaulish word introduced into Latin via Etruscan (cf. Old Irish meit, Welsh maint "size").

Science definitions for mantissa

mantissa

[măn-tĭs′ə]

The part of a logarithm to the base ten that is to the right of the decimal point. For example, if 2.749 is a logarithm, .749 is the mantissa. Compare characteristic.