glacial

Pronunciation

• UK: /ˈɡleɪ.sɪəl/, /ˈɡleɪ.ʃ(ɪ)əl/^[1]

Etymology

It is borrowed from French glacial (“icy”),^[2][3][4][5] and perhaps directly borrowed from Latin glaciālis (“icy, frozen, full of ice”),^{[6][7][8][9][10]} from glaciēs (“ice”) and the suffix -ālis.^[2][10][11] The American Heritage Dictionary notes that the French word goes back to Old French.^[4] Etymonline and Klein derive glaciēs probably from a suffixed form of Proto-Indo-European *gel- (“cold; to freeze”), the source also of gelū (“frost”);^[6][5][4] Klein suggests that it was formed after aciēs (“sharp edge”).^[5] The same root lies behind gelid and, through Germanic, cold.^[5][3]

Earliest recorded meaning

Icy, cold, freezing: 1656, in Thomas Blount's dictionary, the Glossographia.^[2][3][6]

Semantic evolution

The word was at first rare, and Johnson (1755) still defined it only as "icy; made of ice; frozen".^[2][12] In chemistry, from 1682 in Boyle, it meant glass-like or crystallized, a use that survives in glacial acetic acid (1786), pure acetic acid that readily freezes into ice-like crystals.^[2][10] The geological sense, relating to glaciers or to a period when ice covered much of the earth, was apparently coined in 1846 by the British naturalist Edward Forbes;^{[6][13][2][3]} glacial in the sense "produced by glaciers" followed in 1858.^[2] From the slow movement of glaciers came the figurative sense "extremely slow", recorded from 1890,^[2][6] and the word is also used of a cold, unfriendly manner.^[14][10][8] The noun, a glacial period, dates from 1935.^[2][10]

Timeline

• 1656 – cold, icy.^[2][3][10]
• 1682 – in chemistry, glass-like, crystallized.^[2]
• 1786 – glacial acetic acid.^[2]
• 1794 – consisting of ice.^[2]
• 1846 – in geology, marked by the presence of ice, as in glacial period.^[2][6]
• 1858 – produced by glaciers.^[2]
• 1890 – extremely slow.^[2]
• 1935 – noun, a glacial period.^[2]

Meanings

Adjective

1. Of, relating to, or produced by glaciers or ice sheets: glacial erosion.^{[14][10][15][2]}
2. Relating to a period when much of the earth was covered by ice, as in the Pleistocene.^[15][10][2]
3. Extremely cold; icy: a glacial wind off the sea.^[14][10][15]
4. Cold and unfriendly in manner: She gave him a glacial stare.^[14][10][15]
5. Extremely slow: Progress on the bridge has been glacial.^[14][2][15]
6. (chemistry) Forming ice-like crystals, as in glacial acetic acid.^[14][10][2]

Noun

1. A glacial period or stage.^[10][2]

Word family

• glacially
• glacialist
• nonglacial
• superglacial
• glacial acetic acid
• glacial drift
• glacial milk

Related words

• glacier
• glacé
• glacis
• gelid
• gelatin
• cold
• congeal

References

1. ^ 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 q r s t u v Oxford English Dictionary Online (accessed March 2026), Oxford: Oxford University Press
3. ^ a b c d e Barnhart, Robert K. (1988), The Barnhart Dictionary of Etymology
4. ^ a b c The American Heritage Dictionary of the English Language (online 2024), 5th ed., Boston: Houghton Mifflin Harcourt
5. ^ a b c d Klein, Ernest. A Comprehensive Etymological Dictionary of the English Language. 2 vols. Amsterdam: Elsevier, 1966–1967.
6. ^ a b c d e f Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
7. ^ Hoad, T. F., ed. (1986), The Concise Oxford Dictionary of English Etymology, Oxford: Clarendon Press
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. ^ Stevenson, Angus, ed. (2010), Oxford Dictionary of English, 3rd ed., Oxford: Oxford University Press
10. ^ a b c d e f g h i j k l Merriam-Webster Unabridged Dictionary (2024), online ed., Springfield, Mass.: Merriam-Webster
11. ^ Dictionary.com Unabridged (2016), based on the Random House Unabridged Dictionary, New York: Random House
12. ^ Johnson, Samuel (1755), A Dictionary of the English Language, London; 4th ed. 1773; Johnson's Dictionary Online, ed. Beth Rapp Young et al.
13. ^ Weekley, Ernest (1921), An Etymological Dictionary of Modern English, London: John Murray
14. ^ a b c d e f Collins English Dictionary (2023), Glasgow: HarperCollins
15. ^ a b c d e The American Heritage Dictionary of the English Language (1992), 3rd ed., Boston: Houghton Mifflin