Webster's Revised Unabridged Dictionary · 1913

Indivisible

Indivisible , adjective

[Latin indivisibilis: compare French indivisible. See In- not, and Divisible.]

1.
Not divisible; incapable of being divided, separated, or broken; not separable into parts.
One indivisible point of time. — Dryden
2.
(Mathematics) Not capable of exact division, as one quantity by another; incommensurable.

Indivisible , noun

1.
That which is indivisible.
By atom, nobody will imagine we intend to express a perfect indivisible, but only the least sort of natural bodies. — Digby
2.
(Geometry) An infinitely small quantity which is assumed to admit of no further division.
Collocations (1)
Method of indivisibles , a kind of calculus, formerly in use, in which lines were considered as made up of an infinite number of points; surfaces, as made up of an infinite number of lines; and volumes, as made up of an infinite number of surfaces.