Oxygen Definition

ŏksĭ-jən
noun
A colorless, odorless, tasteless, gaseous chemical element that occurs free in the atmosphere, forming one fifth of its volume, and in combination in water, sandstone, limestone, etc.: it is very active, combines with nearly all other elements, is the most common element in the earth's crust, and is essential to life processes and to combustion: symbol, O; at. no. 8
Webster's New World

Molecular oxygen (O2), a colorless, odorless gas at room temperature.

Wiktionary
(countable) An atom of this element.
Wiktionary
Synonyms:
  • atomic number 8
  • o

Other Word Forms of Oxygen

Noun

Singular:
oxygen
Plural:
oxygens

Origin of Oxygen

  • Borrowed from French oxygène (originally in the form principe oxygène, a variant of principe oxigine "˜acidifying principle', suggested by Lavoisier), from Ancient Greek ὀξύς (oxus, “sharp") + γένος (genos, “birth"), referring to oxygen's role in the formation of acids.

    From Wiktionary

  • French oxygène Greek oxus sharp, acid ak- in Indo-European roots French -gène -gen

    From American Heritage Dictionary of the English Language, 5th Edition

Oxygen Is Also Mentioned In

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