conch
Concise Oxford English Dictionary © 2008 Oxford University Press:
conch /kɒŋk, kɒn(t)ʃ/
▶noun (pl. conchs /kɒŋks/ or conches /ˈkɒntʃɪz/)
- 1 a tropical marine mollusc with a robust spiral shell which may bear long projections and have a flared lip. [Strombus and other genera: many species.]
- 2 Architecture the roof of a semicircular apse.
- 3 another term for concha.
– origin ME: from L. concha ‘shellfish, shell’, from Gk konkhē ‘mussel, cockle, or shell-like cavity’.
'conch' also found in these Oxford entries:

