ethenium
构词拆分
ethene词根/词干
+
-ium后缀
(chemistry) Used to form the names of metal elements, after the style of early-named elements, as well as the isotopes of hydrogen. · (chemistry) Used to form the temporary systematic element name of a metallic or nonmetallic element which is postulated to exist, or which has been newly synthesized and has not yet been assigned a permanent name.
词源说明
释义（英文）
名词 Noun
- (inorganic chemistry) The cation, protonated ethylene (C2H5+)