crosta

Forms

crosta f (plural croste)^[1] Old texts also have Old Italian grosta.^[2] The word is grosta at Parma.^[3]

Etymology

It is inherited from Latin crusta (“crust, shell”).^[4][5][6][1]

The same word is French croûte, Occitan crosta, Catalan crosta, Spanish costra and Portuguese crosta.^[5][3]

For Latin crusta Wiktionary gives Proto-Indo-European *krustós (“hardened”), from Proto-Indo-European *krews- (“to form a crust, begin to freeze”).^[1] De Vaan reconstructs *krus-to- (“crushed, pounded”), with Ancient Greek κρούω (kroúō, “to strike”) and Lithuanian krùšti (“to crush”), and counts the link with Ancient Greek κρύος (krúos, “frost”) and κρύσταλλος (krústallos, “ice”) as uncertain.^[7] Nocentini and Devoto take that link as the starting point and conclude, with Old High German hrosa (“crust; ice”), that the first sense was “crust of ice”.^[5][8][1]

Earliest recorded meaning

The TLIO's first record is in Bono Giamboni's Vizi e Virtudi, a Florentine text from before 1292, in the sense of a hard surface layer covering something.^[2][5] DELI and GRADIT first find it in Dante.^[4][6]

Semantic evolution

Dante's Inferno has the crust of ice in which the traitors are frozen: E un de' tristi della fredda crosta / gridò a noi (“and one of the wretches of the cold crust cried out to us”).^[9] Old Italian already spoke of crosta della terra, the surface layer of the ground, and of the crust of bread, standing for bread itself, especially hard or scarce bread.^[2] The scab on a wound is recorded in the 14th century, and Boccaccio used the word for an outward show that hides the reality.^[4]

The shell of crustaceans is recorded in 1561, and before 1798 Francesco Milizia used crosta for a worthless painting, a calque of French croûte (1754), which Panzini explained in 1905 as an old blackened picture that seems to have a crust.^[4][10] Derivatives include crostata, first a savoury pie (13th century, Novellino), then the jam tart (1585), and crostino (1593).^[4] Meyer-Lübke traced the French coutarde, and through it English custard, to crostata.^[3]

Timeline

• Before 1292 – Bono Giamboni uses crosta.^[2][5]
• Before 1321 – Dante has the fredda crosta of ice.^[4][9]
• 14th century – The sense “scab” is recorded.^[4]
• Before 1375 – Boccaccio uses it for an outward appearance.^[4]
• 1561 – The sense “shell of crustaceans” is recorded.^[4]
• 1585 – Crostata “jam tart” appears in Garzoni.^[4]
• Before 1798 – Milizia uses crosta for a worthless painting.^[4]

Meanings

Noun

1. A crust, the hard, dry outer layer of something, such as bread, cheese or ice: Taglia via la crosta del pecorino.^[6][10][11]
2. (figurative) An outward appearance that hides what lies beneath.^[6][10][11]
3. (derogatory) A worthless painting, a daub.^[6][1]
4. (geology) The Earth's crust, crosta terrestre.^[6][10][11]
5. (medicine) A scab, dried blood and serum over a wound: Non grattarti la crosta sul ginocchio.^[6][11][12]
6. (zoology, uncommon) The shell of crustaceans.^[6][11]
7. (tanning) The lower layer split from a thick hide, used for shoes and clothing.^[6][12]
8. (geology) A hard surface deposit formed by minerals coming out of solution.^[6][11]

Word family

• crostata
• crostino
• crostone
• crostoso
• scrostare
• scrostatura
• crosticina
• crosterello

Related words

• crostaceo
• crostolo
• incrostare
• Latin crusta
• French croûte

Usage notes

In crosta in cookery, of meat baked in pastry or in a hollowed-out loaf, is a calque of French en croûte.^[10] Crosta lattea is cradle cap, a scaly rash on a baby's head and face.^[11][6] Both /ˈkrɔsta/ and /ˈkrosta/ are heard.^[1]

References

1. ^ a b c d e f g Wiktionary, the free dictionary, https://en.wiktionary.org
2. ^ a b c d Tesoro della Lingua Italiana delle Origini (1997–), Opera del Vocabolario Italiano, CNR, Firenze; tlio.ovi.cnr.it
3. ^ a b c Meyer-Lübke, Wilhelm (1935), Romanisches etymologisches Wörterbuch, 3rd ed., Heidelberg: Winter
4. ^ a b c d e f g h i j k Cortelazzo, Manlio; Zolli, Paolo (1999), Dizionario etimologico della lingua italiana, 2nd ed. by Manlio Cortelazzo and Michele A. Cortelazzo, Bologna: Zanichelli
5. ^ a b c d e Nocentini, Alberto; Parenti, Alessandro (2010), l'Etimologico: vocabolario della lingua italiana, Firenze: Le Monnier
6. ^ a b c d e f g h i j k De Mauro, Tullio (ed.) (2003), Grande dizionario italiano dell'uso, CD-ROM version 2.0, Torino: UTET
7. ^ de Vaan, Michiel (2008), Etymological Dictionary of Latin and the other Italic Languages, Leiden Indo-European Etymological Dictionary Series 7, Leiden; Boston: Brill
8. ^ Devoto, Giacomo (1968), Avviamento alla etimologia italiana: dizionario etimologico, 2nd ed., Firenze: Le Monnier
9. ^ a b Battaglia, Salvatore; Bàrberi Squarotti, Giorgio (1961–2002), Grande dizionario della lingua italiana, 21 vols., Torino: UTET; digital ed. Accademia della Crusca
10. ^ a b c d e Devoto, Giacomo; Oli, Gian Carlo; Serianni, Luca; Trifone, Maurizio (2026), Nuovo Devoto–Oli: il vocabolario dell'italiano contemporaneo, digital ed., Milano: Le Monnier
11. ^ a b c d e f g Zingarelli, Nicola (2009), Lo Zingarelli 2010: vocabolario della lingua italiana, Bologna: Zanichelli
12. ^ a b Sabatini, Francesco; Coletti, Vittorio; Manfredini, Manuela (2026), Dizionario italiano Sabatini Coletti, digital ed., Milano: Sansoni / Rizzoli Larousse