different between crust vs crustal

English

Etymology

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 ????? (krúos, “frost, icy cold”), ?????????? (krústallos, “crystal, ice”), Avestan ????????????????????????????-? (xruzdra-, “hard”), Sanskrit ?????? (kr??, “thicken, make hard”)

Pronunciation

• IPA^(key): /k??st/
• Rhymes: -?st

Noun

crust (countable and uncountable, plural crusts)

1. A more solid, dense or hard layer on a surface or boundary.
2. The external, hardened layer of certain foodstuffs, including most types of bread, fried meat, etc.
3. An outer layer composed of pastry

   • Th' impenetrable crust thy teeth defies.
4. The bread-like base of a pizza.
5. (geology) The outermost layer of the lithosphere of the Earth.
6. The shell of crabs, lobsters, etc.
7. (uncountable, informal) Nerve, gall.
8. (music) Ellipsis of crust punk (a subgenre of punk music)
9. (Britain, informal) A living.

   Synonyms: daily bread, income, livelihood

   • 1999, Norman Longworth, Making Lifelong Learning Work: Learning Cities for a Learning Century, Psychology Press (?ISBN), page 1:

     Like most of us, I am frequently asked by friends and people I meet in business situations or round the dinner table what I do to earn my crust.

Derived terms

• upper crust

Related terms

• crusted
• crusty
• encrust

Translations

Verb

crust (third-person singular simple present crusts, present participle crusting, simple past and past participle crusted)

1. (transitive) To cover with a crust.
   • 1662, Robert Boyle, An Account of Freezing

     The whole body is crusted over with ice.

   • 1711, Henry Felton, Dissertation on Reading the Classics

     Their minds are crusted over, like diamonds in the rock.

2. (intransitive) To form a crust.

Translations

Anagrams

• cruts, curst, curts

English

Etymology

From crust +? -al.

Pronunciation

• (UK) IPA^(key): /?k??st?l/

Adjective

crustal (comparative more crustal, superlative most crustal)

1. Of, pertaining to, or forming a crust, especially the crust of the Earth or other planet.
   • 2003, Bill Bryson, A Short History of Nearly Everything, BCA, p. 189:

     The hope was to lower a drill through over 4,000 metres of Pacific Ocean water off the coast of Mexico and drill some 5,000 metres through relatively thin crustal rock.

Anagrams

• curtals

French

Adjective

crustal (feminine singular crustale, masculine plural crustaux, feminine plural crustales)

1. crustal