🪶 Extremely small 📐 A tiny amount

infinitesimal

9.5

A tiny quantity in math that is smaller than any ordinary number but not zero

noun
/ˌɪnfɪnɪˈtɛsɪməl/

Specialized

: infinitesimal

And there are no infinitesimals in the real numbers.

Examples

They added the concept of the infinitesimal and that is truly remarkable.
We thought of the action as a sum over little infinitesimal cells.
OK, this is an infinitesimal transformation.
And one of the early assumptions in the book is that curves are made of infinitesimal straight segments.
X is not infinitesimal, it's the length of the rod separating the hot and cold ends.
So this epsilon is the infinitesimal transformation parameter.
The force which I write as DF, meaning an infinitesimal force on an infinitesimal segment is DL cross B.
It is called Infinitesimal Calculus, and it is by Lamb, Cambridge University Press.
Because what infinitesimals DPL and DPT?
In calculus, we often work with infinitesimal quantities that allow us to make precise calculations involving limits.

Compounds

infinitesimal calculus

Specialized

9.9

The part of math that studies how numbers or quantities change using limits, derivatives, and integrals

How Small

infinitesimal

Specialized

9.5

little bit

∞ 1.0

small indefinite quantity

6.0

quantity

179 1.6

Surface Forms

infinitesimal singular

infinitesimals plural

Etymology

Infinitesimal as a noun comes from the same parts in- ('not') and finite ('limited') and the idea of a very small part like decimal. So in math an infinitesimal is thought of as a tiny amount that comes very close to zero but is not exactly zero.