nigrescence

== English == === Etymology === Mid 19th century. From Latin nigrescens, present active participle of nigrescō. By surface analysis, Latin nigr(ēre) +‎ -escence. === Pronunciation === IPA(key): /naɪˈɡrɛsəns/, /nɪˈɡrɛsəns/ === Noun === nigrescence (countable and uncountable, plural nigrescences) The process of becoming black or dark; blackening. A dark complexion. Blackishness. ==== Coordinate terms ==== albescence (“becoming white”), cerulescence (“becoming blue”), erubescence (“becoming red”), flavescence (“becoming yellow”), virescence (“becoming green”) ==== Related terms ==== nigrescent