carboniferous

Etymology

It is formed from English carbon + -iferous,^{[2][3][4][5][6]} the second part meaning producing, containing or bearing;^[4][7] the Shorter Oxford analyses it as carbonic with -i- and -ferous.^[8] Compare French carbonifère, recorded in French by 1831.^[2] Carbon goes back to Latin carbō (“a coal, charcoal”),^[7][4] and -ferous to ferō (“to bear, carry”), from Proto-Indo-European *bʰer- (“to carry”).^[7]

Earliest recorded meaning

Containing or yielding coal, or containing carbon: 1799, in R. Kirwan's Geological Essays.^[2][4][7][3]

Semantic evolution

The adjective was applied to the rocks of the great coal beds of England, France, Germany and the United States.^[7] From 1822, in Conybeare and Phillips's Outline of the Geology of England and Wales, it was used for the period of the Palaeozoic era in which they were laid down, usually spelled with a capital.^[2] Etymonline dates this use to 1832.^[7] The noun, the Carboniferous, is recorded from 1841 for the period or its system of rocks,^[2] although Etymonline finds the stand-alone noun only by 1907, and Barnhart only after the 1940s, as a shortening of Carboniferous period.^[7][4] A humorous use for carrying coals is recorded once, in 1865.^[2] The literal sense, producing coal, is now rare.^[8]

Timeline

• 1799 – containing or yielding coal, or carbon.^[2][4]
• 1822 – in geology, of the period between the Devonian and the Permian.^[2]
• 1841 – noun, the Carboniferous, the period or its rocks.^[2]
• 1865 – humorous, carrying coals (obsolete).^[2]

Meanings

Adjective

1. (geology) Usually Carboniferous: of or relating to the period of the Paleozoic era between the Devonian and the Permian, about 359 to 299 million years ago, when many coal deposits were formed, or to the rocks formed then.^{[3][9][10][2]}
2. Producing or containing coal or carbon.^[3][9][10]

Noun

1. (geology) the Carboniferous: the Carboniferous period, or its system of rocks.^{[3][9][10][2]}

Related words

• carbon
• carbonic
• coniferous

Usage notes

In North American use the period is divided into the Mississippian and the Pennsylvanian.^[9]

References

1. ^ Wiktionary, the free dictionary, https://en.wiktionary.org
2. ^ a b c d e f g h i j k l Oxford English Dictionary Online (accessed March 2026), Oxford: Oxford University Press
3. ^ a b c d e Merriam-Webster Unabridged Dictionary (2024), online ed., Springfield, Mass.: Merriam-Webster
4. ^ a b c d e f Barnhart, Robert K., ed. (1995), The Barnhart Concise Dictionary of Etymology, New York: HarperCollins
5. ^ Barnhart, Robert K. (1988), The Barnhart Dictionary of Etymology
6. ^ Dictionary.com Unabridged (2016), based on the Random House Unabridged Dictionary, New York: Random House
7. ^ a b c d e f g Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
8. ^ a b Shorter Oxford English Dictionary on Historical Principles (2002), 5th ed., ed. William R. Trumble and Angus Stevenson, Oxford: Oxford University Press
9. ^ a b c d The American Heritage Dictionary of the English Language (1992), 3rd ed., Boston: Houghton Mifflin
10. ^ a b c Collins English Dictionary (2023), Glasgow: HarperCollins