helicoid

adjective

he·​li·​coid ˈhe-lə-ˌkȯid How to pronounce helicoid (audio) ˈhē- How to pronounce helicoid (audio)
variants or helicoidal
ˌhe-lə-ˈkȯi-dᵊl How to pronounce helicoid (audio) ˌhē- How to pronounce helicoid (audio)
1
: forming or arranged in a spiral
2
: having the form of a flat coil or flattened spiral
helicoid snail shell

Word History

First Known Use

circa 1704, in the meaning defined at sense 1

Time Traveler
The first known use of helicoid was circa 1704

Browse Nearby Words

helicline
helicoid
helicoidal saw
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Cite this Entry

“Helicoid.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/helicoid. Accessed 28 Mar. 2025.

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Medical Definition

helicoid

adjective
he·​li·​coid ˈhel-ə-ˌkȯid How to pronounce helicoid (audio) ˈhē-lə- How to pronounce helicoid (audio)
variants or helicoidal
ˌhel-ə-ˈkȯid-ᵊl How to pronounce helicoid (audio) ˌhē-lə- How to pronounce helicoid (audio)
1
: forming or arranged in a spiral
2
: having the form of a flat coil or flattened spiral
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