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Dictionary

hel•i•coid

Pronunciation: (hel'i-koid", hē'li-), [key]
—adj.
coiled or curving like a spiral.

—n.
Geom.a warped surface generated by a straight line moving so as to cut or touch a fixed helix.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

helicograph

helicon

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