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.

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Word of the day retroflex
Pronunciation: ˈrɛtrə(ʊ)flɛks
adjective
turned backwards