SRM

noun4

1. •
   Initialism of solar radiation management.

   • If a larger SRM deployment were phased out sufficiently slowly, the rate of warming could be limited, and termination shock avoided, even where it exerted a very large cooling effect. — 2018
2. •
   Initialism of solid rocket motor.
3. •
   Initialism of standard reference material (“a standardized material of known composition used as a reference, to calibrate testing equipment, to validate testing equipment, to test materials and equipment”).
4. •
   Initialism of specified risk material.