hydrogen atom

1. 1.

   an atom of hydrogen

   Broaderatom

   Narroweracidic hydrogendeuterium

   Partshydrogen ion

Questions about hydrogen atom

What does hydrogen atom mean?

hydrogen atom means "an atom of hydrogen".

Is hydrogen atom a common word?

hydrogen atom is banded "Uncommon" — turns up in careful writing rather than conversation. The band comes from how often the word appears in a large corpus of everyday English, not from an editor's impression.