"Commensurate reduction" means that when one thing decreases or is reduced, another related thing also decreases in a corresponding or proportional manner. Full definition
A seven - page summary of the full bill, which appropriates $ 182 billion, says that legislators found money for the Webb telescope «by making commensurate reductions in other programs and institut [ing] several new oversight measures for JWST's continuing development.» (sciencemag.org)
It would be fairer, he went on, to ensure that all drivers contribute towards road costs through a general per mile charge — offset initially by a commensurate reduction in fuel duty. (politics.co.uk)
Fred Moulton: You assert: «the process is not oxidative, and so the commensurate reduction in atmospheric O2 we have seen with rising CO2 requires an oxidative process for its explanation that volcanism can't provide.» (judithcurry.com)