In·di·vis·i·ble, n.
 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. Geom. An infinitely small quantity which is assumed to admit of no further division.
 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.

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