biosphere

Etymology

It is formed from English bio- + sphere,^[2][3][4] after German Biosphäre, a word coined by the geologist Eduard Suess in 1875.^[2][4] Dictionary.com and the Oxford Dictionary of English treat it as a borrowing of the German word,^[5][6] which the latter says was coined from Ancient Greek βίος (bíos, “life”) and σφαῖρα (sphaîra, “ball, sphere”).^[6] Etymonline compares the second part of atmosphere.^[4] The OED compares French biosphère, recorded in the same sense from 1900, and in 1838 for a supposed basic unit of living organisms.^[2]

Earliest recorded meaning

The region of the earth occupied by living things: 1899, in H. R. Mill's International Geography.^[2] Etymonline and Merriam-Webster's Collegiate also give 1899,^[4][7] while Merriam-Webster Unabridged dates the word to 1895^[3] and Dictionary.com to 1895–1900.^[5]

Semantic evolution

From the start the word covered parts of the earth's crust, the oceans and the atmosphere in which life exists, and it was also used for the living organisms themselves.^[2][3] Merriam-Webster also defines it as living things together with their environment.^[3][7] Since 1977 a biosphere has also been an artificial structure that encloses a self-contained ecosystem, especially one cut off from the outside environment.^[2]

Timeline

• 1899 – the part of the earth in which living organisms exist.^[2][4]
• 1977 – an artificial structure enclosing a self-contained ecosystem.^[2]

Meanings

Noun

1. The part of the earth, including parts of its crust, waters and atmosphere, in which living things exist.^[8][3][2]
2. All living organisms taken together with their environment.^[3][7][2]
3. An artificial closed structure containing a self-contained ecosystem.^[2]

Word family

• biospheric

Related words

• sphere
• atmosphere
• biology

References

1. ^ Wiktionary, the free dictionary, https://en.wiktionary.org
2. ^ a b c d e f g h i j k Oxford English Dictionary Online (accessed March 2026), Oxford: Oxford University Press
3. ^ a b c d e f Merriam-Webster Unabridged Dictionary (2024), online ed., Springfield, Mass.: Merriam-Webster
4. ^ a b c d e Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
5. ^ a b Dictionary.com Unabridged (2016), based on the Random House Unabridged Dictionary, New York: Random House
6. ^ a b Stevenson, Angus, ed. (2010), Oxford Dictionary of English, 3rd ed., Oxford: Oxford University Press
7. ^ a b c Merriam-Webster's Collegiate Dictionary (2003), 11th ed., Springfield, Mass.: Merriam-Webster
8. ^ Collins English Dictionary (2023), Glasgow: HarperCollins