atmospheric oxygen

Noun

uncountable

(chemistry) The oxygen molecule O₂, as opposed to the element O.

Japanese Meaning

大気中に存在する酸素分子（O₂）

The levels of atmospheric oxygen have fluctuated significantly over geological time.

地質時代を通じて大気中の酸素の濃度は大きく変動してきた。

Sense（1）

(chemistry) The oxygen molecule O₂, as opposed to the element O.