posttension

verb
post·​ten·​sion | \ˌpōst-ˈten(t)-shən \
posttensioned; posttensioning; posttensions

Definition of posttension 

transitive verb

: to apply tension to (reinforcing steel) after concrete has set

First Known Use of posttension

1950, in the meaning defined above

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The first known use of posttension was in 1950

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