From Longman Dictionary of Contemporary Englishprolongationpro‧lon‧ga‧tion /ˌprəʊlɒŋˈɡeɪʃən $ ˌproʊlɒːŋ-/ noun 1 [singular, uncountable]LONG TIME the act of making something last longerprolongation of the prolongation of life2 [countable]LONG something added to another thing which makes it longer
Examples from the Corpus
prolongation• Anticipations and extensions are optional components of prolongation regions; when either exists they are weak components relative to the arrival.• The unit of prolongation is the prolongational region.• The preoperative radiotherapy did not result in a significant prolongation of survival time.• They are really a southern prolongation of Ponta de São Lourenço.• Clytemnestra let out an unearthly keening howl, her lips snarling back and her tail a stiff prolongation of her backbone.• From the literature it is not clear whether prolongation of therapy beyond four months yield a higher response rate. 