Definitions
from The Century Dictionary.
- Having the spire depressed so that the whorls lie in the same plane, like those of the genus Planorbis; planorboid.
Etymologies
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Examples
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This genus from its distinctly sinistral character is evidently allied to lAmacinay from which its planorbiform mode of growth distinctly separates it.p. i m i t a n 8.
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