1

cycloid

noun cy·cloid \ ˈsī-ˌklȯid \

Definition of cycloid

: a curve that is generated by a point on the circumference of a circle as it rolls along a straight line

cycloidal

play \sī-ˈklȯi-dᵊl\ adjective

Illustration of cycloid

illustration of cycloid

Origin and Etymology of cycloid

French cycloïde, from Greek kykloeidēs circular, from kyklos


2

cycloid

adjective

Definition of cycloid

1 : smooth with concentric lines of growth
  • cycloid scales
; also : having or consisting of cycloid scales
2 : characterized by alternating high and low moods
  • a cycloid personality

First Known Use of cycloid

1847

in the meaning defined at sense 1

See Words from the same year
NEW! Time Traveler

Medical Dictionary

1

cycloid

noun cy·cloid \ ˈsī-ˌklȯid \

medical Definition of cycloid

: a cycloid individual

2

cycloid

adjective

medical Definition of cycloid

: relating to, having, or being a personality characterized by alternating high and low moods — compare cyclothymic

Learn More about cycloid


Seen and Heard

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

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

of the same or a similar kind or nature

Get Word of the Day daily email!

Test Your Vocabulary

May 2018 Words of the Day Quiz

  • spring-flowers
  • Which is a synonym of raillery?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
SCRABBLE® Sprint

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!