underreplacement

under- +‎ replacement

• Rhymes: -eɪsmənt

underreplacement (plural not attested)

1. [c. 1930s] The replacement of a substance by a smaller amount.
   • 1939, United States Department of Commerce, The Annual Report of the Secretary of Commerce, Volumes 24-29 (Volume 27), page viii:

     In the railroad equipment industry, activity failed to recover fully as the slow process of underreplacement had not yet brought plant and equipment facilities to a level consonant with the reduced volume of railroad traffic.

• overreplacement