TWiST

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TWiST

Time without Sx of disease or toxicity AIDS A quality of life indicator, corresponding to the number of months preceding the development of a Sx with ≥ grade 3 HIV disease, whichever occurred first. See Q-TWiST.
References in periodicals archive ?
With a twist, the colors phase continually until twisted off again.
The camera had been ripped out of the ground and the head, which catches people speeding over the 50 mph limit, had been twisted off.
The ZORK incorporates a screwcap, but once that is twisted off, a plastic plunger is pulled out by hand, contributing both a reassuring, cork-reminiscent pop and the ability for secure resealing after opening.