单词 nigrefaction 释义 † nigrefaction Obs. rare—0.[Cf. nigrification.]‘A making black’ (Phillips 1658).{var l=document.getElementsByTagName("link");var r=/OED4.css$/;for(var i=l.length-1;i>=0;i--)with(l[i].href){var m=match(r);if(m&&l[i].id=="oedv4")...