Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Medical
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

heliometer

play
noun he·li·om·e·ter \ˌhē-lē-ˈä-mə-tər\

Definition of heliometer

  1. :  a visual telescope that has a divided objective designed for measuring the apparent diameter of the sun but also used for measuring angles between celestial bodies or between points on the moon

heliometric play \ˌhē-lē-ō-ˈme-trik\ adjective
heliometrically play \-tri-k(ə-)lē\ adverb


Origin of heliometer

French héliomètre, from hélio- 1heli- + -mètre -meter


First Known Use: 1753


Learn More about heliometer


Seen and Heard

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

WORD OF THE DAY

to eat gluttonously or ravenously

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

image1926873504

Which of the following best describes an easily irritated person?

superficial flashy gregarious tetchy
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