Merriam-Webster Logo
SINCE 1828
Menu
×

helicoid

adjective he·li·coid \ ˈhe-lə-ˌkȯid , ˈhē- \
variants: or helicoidal play \ˌhe-lə-ˈkȯi-dᵊl, ˌhē-\

Definition of helicoid

1 : forming or arranged in a spiral
2 : having the form of a flat coil or flattened spiral
  • helicoid snail shell

First Known Use of helicoid

circa 1704

in the meaning defined at sense 1

See Words from the same year
NEW! Time Traveler

Medical Dictionary

helicoid

adjective he·li·coid \ ˈhel-ə-ˌkȯid , ˈhē-lə- \
variants: or helicoidal play \ˌhel-ə-ˈkȯid-ᵊl, ˌhē-lə-\

medical Definition of helicoid

1 : forming or arranged in a spiral
2 : having the form of a flat coil or flattened spiral

Learn More about helicoid

  1. See words that rhyme with helicoid

Seen and Heard

What made you want to look up helicoid? Please tell us where you read or heard it (including the quote, if possible).

show hide

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

WORD OF THE DAY

notorious

play

widely and unfavorably known

Get Word of the Day daily email!

TRENDING NOW

  1. asylum 'protection from arrest and extradition given especially to political refugees'

  2. insubordinate 'disobedient to authority'

  3. promulgate 'to make known by open declaration'

  4. epochal 'momentous or unparalleled'

  5. clemency 'merciful treatment of someone who could be given harsh punishment'

SEE ALL

BROWSE DICTIONARY

helicoid

Test Your Vocabulary

Words for Summer: A Quiz

  • a-closeup-of-a-sunflower
  • Which of the following words means “of or relating to summer”?
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
Word Winder's CrossWinder

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

Words at Play

Ask the Editors

Word Games