[in-fin-i-tes-uh-muh
l] 
| 1. | indefinitely or exceedingly small; minute: infinitesimal vessels in the circulatory system. |
| 2. | immeasurably small; less than an assignable quantity: to an infinitesimal degree. |
| 3. | of, pertaining to, or involving infinitesimals. |
| 4. | an infinitesimal quantity. |
| 5. | Mathematics. a variable having zero as a limit. |
| infinitesimal (ĭn'fĭn-ĭ-těs'ə-məl) Pronunciation Key
Adjective Capable of having values approaching zero as a limit. Noun A function or variable continuously approaching zero as a limit. |