PROTIUM


Meaning of PROTIUM in English

[ 'prəʊtɪəm ]

■ noun Chemistry the common, stable isotope of hydrogen, as distinct from deuterium and tritium.

Origin

1930s: mod. L., from Gk prōtos 'first'.

Concise Oxford English vocab.      Сжатый оксфордский словарь английского языка.