crust

Meanings

1. 1
   verb

   to form a crust or form into a crust

   The bread crusted in the oven.

2. 2
   noun

   An outer layer composed of pastry

   Th' impenetrable crust thy teeth defies.

3. 3
   noun

   The outermost layer of the lithosphere of the Earth.

   Holonyms: lithosphere < Earth.

4. 4
   noun

   The outermost layer of the lithosphere of any terrestrial planet.

   Holonyms: lithosphere < planet.

From Middle English cruste, from Anglo-Norman and Old French cruste, from Latin crusta (“hard outer covering”), from Proto-Indo-European *krustós (“hardened”), from *krews- (“to form a crust, begin to freeze”), related to Old Norse hroðr (“scurf”), Old English hruse (“earth”), Old High German hrosa (“crust, ice”), Latvian kruvesis (“frozen mud”), Ancient Greek κρύος (krúos, “frost, icy cold”), κρύσταλλος (krústallos, “crystal, ice”), Avestan 𐬑𐬭𐬎𐬰𐬛𐬭𐬀- (xruzdra-, “hard”), Sanskrit क्रूड् (krūḍ, “thicken, make hard”). Doublet of crusta.

Topics