conch

Từ điển Oxford Advanced Learner 8th

conch [conch conchs conches] BrE [kɒntʃ] NAmE [kɑːntʃ] noun
the shell of a sea creature which is also called a conch

Word Origin:
late Middle English: from Latin concha ‘shellfish, shell’, from Greek konkhē ‘mussel, cockle, or shell-like cavity’.