By partial reversal of the name of its inventor, F. B. Gilbreth, American engineer.
therblig (plural therbligs)
- (time and motion study) Any of a set of fundamental motions required for a worker to perform a manual operation.
1973, Robert A. Heinlein, Time Enough for Love:
- Minimize your therblig until it becomes automatic; this doubles your effective lifetime—and thereby gives time to enjoy butterflies and kittens and rainbows.