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Medieval Latin spīrālis of a spiral from Latin spīra coil spire2
American Heritage Dictionary of the English Language, 5th Edition
Via Medieval Latin spiralis from Latin spira
She tucked the pencil in the spiral part of her tablet.
A spiral stairway leads from the base of this pedestal to the torch.
He looked up to see the boy standing above him, holding out a small spiral notebook.
F, Fixed coil; D, Movable coil; S, Spiral spring; T, Torsion head; MM, Mercury cups; I, Index needle.
Club-shaped hydranths with numerous tentacles, generally scattered irregularly, sometimes with a spiral arrangement, or in whorls (" verticillate ").
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