Definition of staircase shell in English:

staircase shell

Line breaks: stair|case shell

noun

Another term for wentletrap.
More example sentences
  • "These "staircase shells" are delicately graceful in shape, which makes them a favorite of shell collectors.
  • Normally these staircase shells, as wentletraps are also called, never leave their coral hosts.

Get more from Oxford Dictionaries

Subscribe to remove adverts and access premium resources

Word of the day hypnopompic
Pronunciation: ˌhɪpnə(ʊ)ˈpɒmpɪk
adjective
relating to the state immediately preceding waking up