conch
US /kɑːŋk/
UK /kɑːŋk/

1.
conchiglia, conca
a tropical marine mollusk with a spiral shell that may bear long projections and have a flared lip. Conch shells are often used as ornaments or for blowing to produce a musical sound.
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The diver found a beautiful conch shell on the seabed.
Il subacqueo ha trovato una bellissima conchiglia di conchiglia sul fondale marino.
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He blew into the conch shell to signal the start of the ceremony.
Ha soffiato nella conchiglia di conchiglia per segnalare l'inizio della cerimonia.