prolongate

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pro·lon·gate

 (prə-lông′gāt′, -lŏng′-, prō-)
tr.v. pro·lon·gat·ed, pro·lon·gat·ing, pro·lon·gates
To prolong.

pro′lon·ga′tion (prō′lông-gā′shən, -lŏng-) n.

pro•long

(prəˈlɔŋ, -ˈlɒŋ)

v.t.
1. to extend the duration of; cause to continue longer.
2. to make longer in spatial extent: to prolong a line.
[1375–1425; late Middle English < Late Latin prōlongāre to lengthen =prō- pro-1 + -longāre, v. derivative of longus long1]
pro•long′a•ble, adj.
pro•long′a•bly, adv.
pro•long′er, n.
pro•long′ment, n.
syn: See lengthen.
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prolongate

verb
To make or become longer:
Mathematics: produce.
Translations
References in periodicals archive ?
By choosing an appropriate interpolation operator, Reitzinger and Schoberl [20] show that each coarse level gradient prolongates to a fine level gradient, i.