in·fin·i·tes·i·mal /(ˌ)ɪnˌfɪnəˈtɛsəməl, zəməl/
(a.)極小的,極微的,無限小的極小量,極微量,無限小
In·fin·i·tes·i·mal, n. Math. An infinitely small quantity; that which is less than any assignable quantity.
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In·fin·i·tes·i·mal a. Infinitely or indefinitely small; less than any assignable quantity or value; very small.
Infinitesimal calculus, the different and the integral calculus, when developed according to the method used by Leibnitz, who regarded the increments given to variables as infinitesimal.
infinitesimal
adj : infinitely or immeasurably small; "two minute whiplike
threads of protoplasm"; "reduced to a microscopic
scale" [syn: minute, microscopic]