| 单词 | helicoid |
| 释义 | helicoid[ hel-i-koid, hee-li- ] / ˈhɛl ɪˌkɔɪd, ˈhi lɪ- / SEE SYNONYMS FOR helicoid ON THESAURUS.COM adjectivecoiled or curving like a spiral. nounGeometry. a warped surface generated by a straight line moving so as to cut or touch a fixed helix. Origin of helicoidFirst recorded in 1690–1700, helicoid is from the Greek word helikoeidḗs of spiral form. See helic-, -oid OTHER WORDS FROM helicoidhel·i·coi·dal, adjectivehel·i·coi·dal·ly, adverbWords nearby helicoidhelicine artery, helicity, helicline, helico-, helicograph, helicoid, helicoid cyme, helicon, helicopod gait, helicopt, helicopter Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 British Dictionary definitions for helicoidhelicoid / (ˈhɛlɪˌkɔɪd) / adjective also: helicoidalbiology shaped like a spirala helicoid shell noungeometry any surface resembling that of a screw thread Derived forms of helicoidhelicoidally, adverbCollins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012 Medical definitions for helicoidhelicoid [ hĕl′ĭ-koid′, hē′lĭ- ] adj.Arranged in or having the general shape of a flattened coil or spiral. The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company. Scientific definitions for helicoidhelicoid [ hĕl′ĭ-koid′, hē′lĭ- ] AdjectiveArranged in or having the approximate shape of a flattened coil or spiral curve. NounA surface in the form of a coil or screw. A helicoid is generated mathematically by rotating a plane or twisted curve about an axis at a fixed rate and simultaneously translating it in the direction of the line of axis, also at a fixed rate. The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved. |
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