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helicoid

   Also found in: Dictionary/thesaurus, Medical, Legal, Wikipedia 0.01 sec.
helicoid [′hel·ə‚kȯid]
(invertebrate zoology)
Of a gastropod shell, shaped like a flat coil or flattened spiral.
(mathematics)
A surface generated by a curve which is rotated about a straight line and also is translated in the direction of the line at a rate that is a constant multiple of its rate of rotation.
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