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Oxygen vs Preaerobic - What's the difference?

oxygen | preaerobic |

As a noun oxygen

is a chemical element (symbol o) with an atomic number of 8 and relative atomic mass of 159994.

As an adjective preaerobic is

(biology) describing life on earth that evolved before there was oxygen in the atmosphere.

oxygen

English

Noun

(wikipedia oxygen)
  • A chemical element (symbol O) with an atomic number of 8 and relative atomic mass of 15.9994.
  • Molecular oxygen (O2), a colorless, odorless gas at room temperature.
  • * {{quote-magazine, year=2013, month=September-October, author= Katie L. Burke
    • , magazine=(American Scientist), title= In the News , passage=Oxygen' levels on Earth skyrocketed 2.4 billion years ago, when cyanobacteria evolved photosynthesis: the ability to convert water and carbon dioxide into carbohydrates and waste ' oxygen using solar energy. The evolutionary precursor of photosynthesis is still under debate, and a new study sheds light.}}
  • (medicine) A mixture of oxygen and other gases, administered to a patient to help him or her to breathe.
  • (countable) An atom of this element.

    • Derived terms

    * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *

    Related terms

    * BSCCO * Entonox * hydroxy- * hydroxyl * oxide * oxo-, oxo * oxy-, oxy * oxygenase * oxygenate * oxygenation * oxylith * oxytocic * YBCO

    Synonyms

    * sourstuff * when used as a packaging gas

    See also

    * ozone ----

    preaerobic

    English

    Adjective

    (-)
  • (biology) Describing life on Earth that evolved before there was oxygen in the atmosphere