di-
pref 前綴
1 (with ns 後與名詞結合) two; double 二; 雙; 二重; 二倍: dicotyledon.
2 (chemistry 化) (with ns in names of chemical compounds 後與名詞結合構成化合物名稱) containing two atoms or groups of the specified type 含有兩個原子的; 含有兩組某一類型物質的: dioxide
dichromate. Cf 參看 bi-, tri-.