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Answer for the clue "(mathematics) an expression such that each term is generated by repeating a particular mathematical operation ", 9 letters:
recursion

Word definitions for recursion in dictionaries

Wikipedia Word definitions in Wikipedia
Recursion occurs when a thing is defined in terms of itself or of its type. Recursion is used in a variety of disciplines ranging from linguistics to logic . The most common application of recursion is in mathematics and computer science , where a function ...

WordNet Word definitions in WordNet
n. (mathematics) an expression such that each term is generated by repeating a particular mathematical operation

Wiktionary Word definitions in Wiktionary
n. 1 The act of recurring. 2 (context mathematics English) The act of defining an object (usually a function) in terms of that object itself. 3 (context computing English) The calling of a function from within that same function.

Douglas Harper's Etymology Dictionary Word definitions in Douglas Harper's Etymology Dictionary
1610s, from Latin recursionem (nominative recursio ) "a running backward, return," noun of action from past participle stem of recurrere "run back" (see recur ).

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Recursion \Re*cur"sion\ (-sh?n), n. [L. recursio. See Recur .] The act of recurring; return. [Obs.] --Boyle. (Math.) The calculation of a mathematical expression (or a quantity) by repeating an operation on another expression which was derived by application ...

Usage examples of recursion.

Lovering laughs off recursion and takes up another tack: the key is to find some formal symmetry folded in this four-base chaos.

You use recursion for certain data-sorting algorithms and things like that.

The coastline was an indefinite recursion of islands and straits and inlets.

I recognize as well the patterns he has linked through a partial recursion that has the lean elegance of most of his solutions.

Crowding under slowworms of lit glass spelling names and services, simple animationsa red-mouthed lady drawn with the light, replaced stutteringly with another who had raised her glass, and back again in autistic illuminant recursion.

You use recursion for certain data-sorting algorithms and things like that.

Looking outward, she no longer saw, but continued imagining a vista of everchanging patterns, stretching into infinite recursion across the cloud-flecked sky.

Another obvious thing for a gene to do is to influence the depth of the recursion, the number of successive branchings.

Personally, I always thought there was a clue from computer programming, in a procedure called recursion.

Being able to glance out into this bewildering complexity of infinite recursion and say things like, `Oh, hi Ed!

Being able to glance out into this bewildering complexity of infinite recursion and say things like, 'Oh, hi Ed!