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

he·lio·met·ric play \ˌhē-lē-ō-ˈme-trik\ adjective
he·lio·met·ri·cal·ly 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

February 12, 2016

of, relating to, or suggestive of marble

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

image33683556

How much does a batman (the Turkish unit of measurement) weigh?

2.2 pounds 196.5 pounds 16.96 pounds 100 pounds
Name That Thing

10 quick questions: hear them, spell them, and see how your skills compare to the crowd.

TAKE THE QUIZ
SCRABBLE® Sprint

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

TAKE THE QUIZ