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a helicoid generated by rotating and translating a line at a constant rate about an axis to which it is perpendicular
Arranged in or having the approximate shape of a flattened coil or spiral.
A surface in the form of a coil or screw.
[Greek helikoeidēs : helix, helik-, spiral; see helix + -oeidēs, -oid.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
(Biology) biology shaped like a spiral: a helicoid shell.
(Mathematics) geometry any surface resembling that of a screw thread
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
hel•i•coid(ˈhɛl ɪˌkɔɪd, ˈhi lɪ-)
1. coiled or curving like a spiral.n.
2. a warped geometric surface generated by a straight line moving so as to cut or touch a fixed helix.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.