Dextral shell


  • Webster's Revised Unabridged Dictionary
    • Dextral shell (Zoöl) a spiral shell the whorls of which turn from left right, or like the hands of a watch when the apex of the spire is toward the eye of the observer.
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In literature:

SHELLS, sinistral and dextral, ii.
"The Variation of Animals and Plants Under Domestication, Volume II (of 2)" by Charles Darwin