hal·o·gen /ˈhæləʤən/
鹵素
halo·gen /ˈhæləʤən/ 名詞
鹵素
Hal·o·gen n. Chem. An electro-negative element or radical, which, by combination with a metal, forms a haloid salt; especially, chlorine, fluorine, bromine, and iodine; sometimes, also cyanogen. See Chlorine family, under Chlorine.
◄ ►
halogen
n : any of five related nonmetallic elements (fluorine or
chlorine or bromine or iodine or astatine) that are all
monovalent and readily form negative ions