['eθileitiŋ]
乙基化(的)

Ethylate \Eth"y*late\ ([e^]th"[i^]l*[asl]t), v. t. [imp. & p. p.
{Ethylated}; p. pr. & vb. n. {Ethylating}.] [From {Ethyl}.]
(Chem.)
To treat in such a way as to cause the introduction of one or
more ethyl groups, {C2H5-}; as, to ethylate alcohol.
[Webster 1913 Suppl.]