The ratio of the extension of a material to the length of the material prior to stretching.
The period of this extra time:
A variation of clothing size longer than the average for that size
A part or thing added to make something reach further or last longer; extension, supplement, sequel, etc.
Find another word for prolongation. In this page you can discover 11 synonyms, antonyms, idiomatic expressions, and related words for prolongation, like: elongation, extension, protraction, long, perpetuation, lengthening, lengthiness, continuation, shortening, and decompensation.