重氢

Traditional form:

重氫

Pinyin (reading):

zhòngqīng

Definitions:

• heavy hydrogen (isotope)
• deuterium

Characters:

• 重 - heavy, weighty; to double, to repeat
• 氢 - ammonia

Traditional characters:

• 重 - heavy, weighty; to double, to repeat
• 氫 - ammonia