incandescent

Etymology

It is borrowed from Latin incandēscēns (“glowing”), the present participle of incandēscō (“to become hot, glow, kindle”),^{[2][3][4][5][6]} from in-, here intensive or "within",^[7][3][8] and candēscō (“to begin to glow, become white”),^[3][9] the inchoative of candeō (“to shine, be white”),^[9][3] which Etymonline traces to Proto-Indo-European *kand- (“to shine”).^[3] Several dictionaries take it as coming through French incandescent: Merriam-Webster Unabridged calls that probable,^[9] Hoad, the Shorter Oxford and the Oxford Dictionary of English state it,^[10][11][7] and Etymonline and Barnhart leave both routes open.^[3][12] The OED notes only that the French has it too, from the Académie's dictionary of 1798.^[2]

Earliest recorded meaning

Giving out light because of a high temperature; glowing with heat: 1794, in J. Hutton's Dissertation upon Philosophy of Light.^{[2][9][3][12]} Dictionary.com gives the range 1785–95.^[4]

Semantic evolution

The verb incandesce, perhaps a back-formation from the adjective, followed in 1838, originally in science.^[3] Barnhart first records its use of the light produced by incandescence in 1848,^[12] and in 1881 it was applied to the electric light of a glowing filament, as distinct from the arc light, by Sir W. Thomson in Nature.^[2][3] The ordinary senses spread in the same period: "intensely hot" (1859, rare), "ardent, fiery" of feeling or expression (1859) and "brilliantly shining" (1867).^[2] Merriam-Webster Unabridged quotes Virginia Woolf on "all those flowers incandescent".^[9] From 1908 the word was also a noun, for an incandescent lamp or burner.^[2] Collins records the informal sense "extremely angry",^[13] and in 1902 American campus slang used it for "mildly drunk".^[14]

Timeline

• 1794 – glowing with heat.^[2][9][12]
• 1848 – of light, produced by incandescence.^[12]
• 1859 – figurative, ardent, fiery; also intensely hot.^[2]
• 1867 – glowing, brilliantly luminous.^[2]
• 1881 – of electric light from a glowing filament.^[2][3]
• 1902 – in American campus slang, mildly drunk.^[14]
• 1908 – noun, an incandescent lamp or burner.^[2]

Meanings

Adjective

1. Giving out light because of intense heat; red-hot or white-hot: incandescent lava.^[13][9][2]
2. Of a lamp or its light, produced by a glowing filament.^[2][11]
3. Strikingly bright or radiant; brilliant: an incandescent performance.^[9][2]
4. Warm or intense in feeling; ardent, fiery.^[9][2][11]
5. (informal) Extremely angry.^[13]

Noun

1. An incandescent lamp or burner.^[2][11]

Word family

• incandescently
• nonincandescent
• incandescent lamp

Related words

• incandescence
• incandesce
• candescent
• candid
• candidate
• candle
• incense
• incendiary

References

1. ^ a b Wiktionary, the free dictionary, https://en.wiktionary.org
2. ^ a b c d e f g h i j k l m n o p Oxford English Dictionary Online (accessed March 2026), Oxford: Oxford University Press
3. ^ a b c d e f g h i j Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
4. ^ a b Dictionary.com Unabridged (2016), based on the Random House Unabridged Dictionary, New York: Random House
5. ^ Skeat, Walter W. (1911), A Concise Etymological Dictionary of the English Language, new ed., Oxford: Clarendon Press
6. ^ Klein, Ernest. A Comprehensive Etymological Dictionary of the English Language. 2 vols. Amsterdam: Elsevier, 1966–1967.
7. ^ a b Stevenson, Angus, ed. (2010), Oxford Dictionary of English, 3rd ed., Oxford: Oxford University Press
8. ^ Cresswell, Julia (2021), Oxford Dictionary of Word Origins, 3rd ed., Oxford: Oxford University Press
9. ^ a b c d e f g h i Merriam-Webster Unabridged Dictionary (2024), online ed., Springfield, Mass.: Merriam-Webster
10. ^ Hoad, T. F., ed. (1986), The Concise Oxford Dictionary of English Etymology, Oxford: Clarendon Press
11. ^ a b c d Shorter Oxford English Dictionary on Historical Principles (2002), 5th ed., ed. William R. Trumble and Angus Stevenson, Oxford: Oxford University Press
12. ^ a b c d e Barnhart, Robert K. (1988), The Barnhart Dictionary of Etymology
13. ^ a b c Collins English Dictionary (2023), Glasgow: HarperCollins
14. ^ a b Green, Jonathon (2010), Green's Dictionary of Slang, London: Chambers; digital ed. 2016–, https://greensdictofslang.com