glacis

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glacis¹

  • /ˈɡleɪsɪs/ US, UK
  • /ˈɡlæsi/ US, UK

Sounds like glassy (no trap-bath split) · Rhymes with -eɪsɪs, -æsi

Where it comes from

Borrowed from French glacis (“slippery surface”), derived from Old French glacier (“to glide; freeze”), the former from Latin glaciāre (“to freeze”), from glaciēs (“ice”), of uncertain origin.

Cognates

* Medieval Latin glatia (“incline in front of a fortification”)

noun glacises · glacis

  1. A gentle incline. The foam of these great ruins mounts in an instant to the ridge of the sand glacis, swiftly fleets back again, and is met and buried by the next breaker.
  2. A gentle sloping landform created by the deposition or erosion of material.
  3. also, figuratively A gentle incline in front of a fortification which protects it from cannon fire and exposes attackers to more effective return fire from defenders. I think, quoth Corporal Trim, with humble submission to your Honour’s better judgment,——that these ravelins, bastions, curtins, and hornworks, make but a poor, contemptible, fiddle-faddle piece of work of it here upon paper, compared to what your Honour and I could make of it were we in the country

    Similar: talus

  4. In full glacis plate: the angled armour plate on the front of a tank which protects it from projectiles; also (often nautical), such a plate protecting an opening (for example, on a ship).
  5. A device for sorting mail which slides parcels across a sloped surface.

Glacis²

proper noun

  1. An administrative district of Seychelles.

Translations

Every language

noun gentle incline

Русскийполо́гий скат pológij skat

noun gentle incline in front of a fortification

Españolglacis
한국어글라시 geullasi
日本語斜堤 hasu tsutsumi
中文斜堤 xiédī, xiétí
Portuguêsglacis
Françaisglacis
DeutschGlacis
Italianospalto
Românăglacis
Русскийгласис glasis
עבריתחלקלקה

noun tank's angled armour plate

Русскийлобова́я дета́ль lobovája detálʹ

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Cite this
MLA

"glacis." Wiktionary, via Micwyn, micwyn.com/word/glacis. Accessed 6 Nov. 2026.

APA

glacis. (n.d.). In Wiktionary, via Micwyn. Retrieved November 6, 2026, from https://micwyn.com/word/glacis

Chicago

"glacis." Wiktionary, via Micwyn. Accessed November 6, 2026. https://micwyn.com/word/glacis.

BibTeX
@misc{glacis_2026,
  title = {glacis},
  howpublished = {Wiktionary, via Micwyn},
  year = {2026},
  url = {https://micwyn.com/word/glacis},
  urldate = {2026-11-06}
}