dihydrogen

English

Etymology

From di- +‎ hydrogen.

Noun

dihydrogen (uncountable)

1. (chemistry) The divalent radical formed from two separate hydrogen atoms or ions
2. (chemistry, modifying a noun) Describing a dihydrogen bond
3. (inorganic chemistry) The hydrogen molecule H₂

Usage notes

• Used informally in dihydrogen monoxide, the supposed scientific name for water
• Used in mixed salts, such as calcium dihydrogen phosphate

Derived terms

• calcium dihydrogen phosphate
• dihydrogen arsenate
• dihydrogen monoxide
• dihydrogen oxide
• dihydrogen phosphate