原子番号: atomic number

(physics, chemistry) atomic number

helium

縛る: bind, tie, gird

縛り: binding

指板: fingerboard

言語: language / 原語: the original language

語源: etymology

元号: An era name. / 減劫: (Buddhism) A process whereby human lifespans decline from 80,000 years to 10 years, decreasing by one year each year or each century. / 減号: The negative or minus sign. / 賢劫:

外言語: external language