infinitesimal

[ in-fin-i-tes-uh-muh l ]
/ ˌɪn fɪn ɪˈtɛs ə məl /

adjective

indefinitely or exceedingly small; minute: infinitesimal vessels in the circulatory system.
immeasurably small; less than an assignable quantity: to an infinitesimal degree.
of, relating to, or involving infinitesimals.

noun

an infinitesimal quantity.
Mathematics. a variable having zero as a limit.

QUIZZES

This Word Of The Day Quiz Is Far From Thersitical
Have you mastered the meaning of phronesis? How about plethoric? Take the quiz on the words from the week of February 17 to 23 to find out.
Question 1 of 7
Lincolnesque

Origin of infinitesimal

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

OTHER WORDS FROM infinitesimal

in·fin·i·tes·i·mal·i·ty, in·fin·i·tes·i·mal·ness, nounin·fin·i·tes·i·mal·ly, adverb
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for infinitesimal

British Dictionary definitions for infinitesimal

infinitesimal
/ (ˌɪnfɪnɪˈtɛsɪməl) /

adjective

infinitely or immeasurably small
maths of, relating to, or involving a small change in the value of a variable that approaches zero as a limit

noun

maths an infinitesimal quantity

Derived forms of infinitesimal

infinitesimally, adverb
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

Scientific definitions for infinitesimal

infinitesimal
[ ĭn′fĭn-ĭ-tĕsə-məl ]

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 Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.