from The Century Dictionary.
- noun In conchology, the typical genus of Pleurotomidæ: so called from the notch or slit in the outer lip of the aperture.
from the GNU version of the Collaborative International Dictionary of English.
- noun (Zoöl.) Any marine gastropod belonging to Pleurotoma, and ether allied genera of the family
Pleurotmidæ. The species are very numerous, especially in tropical seas. The outer lip has usually a posterior notch or slit.
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