- (of a singularity of a function of a complex variable) noting that the Laurent series at the point has an infinite number of terms with negative powers.
- (of a discontinuity) noting that the function is discontinuous and has no limit at the point.Compare removable(def 2).
Origin of essential
Examples from the Web for essential
But Winning Marriage will be essential for the historian who, someday, tries to tell the full story.The Real Story Behind the Fight for Marriage Equality|E.J. Graff|December 30, 2014|DAILY BEAST
Law is essential to freedom because it safeguards citizens against misconduct and abuse.
Dana Rubenstein of The New York Observer wrote that “essential to the experience was segregation.”I Watched a Casino Kill Itself: The Awful Last Nights of Atlantic City’s Taj Mahal|Olivia Nuzzi|December 8, 2014|DAILY BEAST
Young Living traffics in essential oils designed to help relax and rejuvenate.
A simple look around the Internet finds much to worry about in the world of essential oils.
Nonviolence is essential to these people—they have vitality without needing destruction.Planet of the Damned|Harry Harrison
Feed upon Him; that is the essential central requirement for all Christian life, and what does feeding on Him mean?
Even to-day there are many people who fail to grasp the essential facts of this situation.The Outline of History: Being a Plain History of Life and Mankind|Herbert George Wells
When people live in flats, it is essential that they show some consideration for their neighbours.The Lady of the Basement Flat|Mrs. George de Horne Vaizey
And there is no way in which it can show so much impartiality, and exercise practically the most essential conception of freedom.Humanity in the City|E. H. Chapin
British Dictionary definitions for essential
Word Origin and History for essential
mid-14c., "that is such by its essence," from Late Latin essentialis, from essentia (see essence). Meaning "pertaining to essence" is from late 14c., that of "constituting the essence of something" is from 1540s; that of "necessary" is from 1520s. Essentials "indispensable elements" is from early 16c. Related: Essentially.