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prolongation

[proh-lawng-gey-shuh n, -long-] /ˌproʊ lɔŋˈgeɪ ʃən, -lɒŋ-/
noun
1.
the act of prolonging:
the prolongation of a line.
2.
the state of being prolonged.
3.
a prolonged or extended form.
4.
an added part.
Origin of prolongation
1480-1490
1480-90; < Late Latin prōlongātiōn- (stem of prōlongātiō) extension. See prolongate, -ion
Related forms
nonprolongation, noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Word Origin and History for prolongation
n.

late 14c., from Old French prolongation (14c.), from Late Lation prolongationem (nominative prolongatio), noun of action from past participle stem of Latin prolongare (see prolong).

Online Etymology Dictionary, © 2010 Douglas Harper
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Word Value for prolongation

15
20
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