Unified screw thread

What is Unified screw thread?

Unified screw thread definition and meaning on Dictionary terms:
adjective
supporting, conforming to, or derived from a theory or doctrine about uniformity, especially on the subject of geology.
Geology. of or relating to the thesis that processes that operated in the remote geological past are not different from those observed now.

noun
a person who accepts or supports a uniformitarian theory.

 

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