Found 2 items, similar to infinitesimal.
English → English (WordNet) Definition: infinitesimal infinitesimal adj : infinitely or immeasurably small; “two minute whiplike threads of protoplasm”; “reduced to a microscopic scale” [syn: minute, microscopic]
English → English (gcide) Definition: Infinitesimal Infinitesimal \In`fin*i*tes"i*mal\, a. [Cf. F. infinit['e]simal, fr. infinit['e]sime infinitely small, fr. L. infinitus. See Infinite, a.] Infinitely or indefinitely small; less than any assignable quantity or value; very small. [1913 Webster] 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. [1913 Webster] Infinitesimal \In`fin*i*tes"i*mal\, n. (Math.) An infinitely small quantity; that which is less than any assignable quantity. [1913 Webster]