- 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.
- an infinitesimal quantity.
- Mathematics. a variable having zero as a limit.
Origin of infinitesimal
Examples from the Web for infinitesimally
It has 32 members—and 16 of them come from the infinitesimally tiny portion of the planet that makes its living in high finance.The Next Step in the Divestment Fight: Bill McKibben
September 21, 2013
Just think—that sparrow when we last saw it was infinitesimally small.The Girl in the Golden Atom
Raymond King Cummings
He must have been infinitesimally small; but that did not matter.Mystic London:
Charles Maurice Davies
Their success, of which so much is said in England and America, is "infinitesimally small."From Egypt to Japan
Henry M. Field
Then carefully, ever so infinitesimally, he adjusted a knob on the device.Where I Wasn't Going
The trouble is that they are so small, so infinitesimally small, almost.Marvels of Scientific Invention
Thomas W. Corbin
- 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
- maths an infinitesimal quantity
Word Origin and History for infinitesimally
1710 (1650s as a noun), "infinitely small," from Modern Latin infinitesimus, from Latin infinitus "infinite" (see infinite) + -esimus, as in centesimus "hundredth." Related: Infinitesimally.
- Capable of having values approaching zero as a limit.
- A function or variable continuously approaching zero as a limit.