D defs.my
Entry 1 sense Webster, 1913

Yellowing

· Yel·low·ing · IPA /jˈɛloʊɪŋ/
01 n. The act or process of making yellow.
  1. 1.
    The act or process of making yellow.
    “Softened . . . by the yellowing which time has given.” G. Eliot.