'Bubble shell' definitions:

Definition of 'bubble shell'

From: WordNet
noun
Marine gastropod mollusk having a very small thin shell

Definition of 'Bubble shell'

From: GCIDE
  • Bubble shell \Bub"ble shell`\ (Zool.) A marine univalve shell of the genus Bulla and allied genera, belonging to the Tectibranchiata. [1913 Webster]