氨基酸

amino acid

ammonia

amino / amino group

(bound form) base; foundation / (bound form) radical (chemistry) / (bound form) gay (loanword from English into Cantonese, Jyutping: gei1, followed by orthographic borrowing from Cantonese)

sour / tart / sick at heart / grieved / sore / aching / pedantic / impractical / to make sarcastic remarks about sb / an acid