# infinitesimally

## infinitesimal

[in-fin-i-tes-uh-muhl]
1.
indefinitely or exceedingly small; minute: infinitesimal vessels in the circulatory system.
2.
immeasurably small; less than an assignable quantity: to an infinitesimal degree.
3.
of, pertaining to, or involving infinitesimals.
noun
4.
an infinitesimal quantity.
5.
Mathematics. a variable having zero as a limit.

Origin:
1645–55; < Neo-Latin infīnītēsim(us), equivalent to Latin infīnīt(us) infinite + -ēsimus suffix of ordinal numerals + -al1

infinitesimality, infinitesimalness, noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source Link To infinitesimally
Collins
World English Dictionary
 infinitesimal (ˌɪnfɪnɪˈtɛsɪməl) —adj 1. infinitely or immeasurably small 2. maths of, relating to, or involving a small change in the value of a variable that approaches zero as a limit —n 3. maths an infinitesimal quantity infini'tesimally —adv

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
Cite This Source
Etymonline
Word Origin & History

infinitesimal
1710, "infinitely small," from Mod.L. infinitesimus, coined by Ger. philosopher and mathematician Baron Gottfried Wilhelm von Leibniz (1646-1716) from L. infinitus "infinite" (see infinite) + -esimus, as in centesimus "hundredth."
Online Etymology Dictionary, © 2010 Douglas Harper
Cite This Source
American Heritage
Science Dictionary
 infinitesimal   (ĭn'fĭn-ĭ-těs'ə-məl)  Pronunciation Key  Adjective   Capable of having values approaching zero as a limit. Noun   A function or variable continuously approaching zero as a limit.
The American Heritage® Science Dictionary