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

isobar

play
noun iso·bar \ˈī-sə-ˌbär\

Definition of isobar

  1. 1 :  an imaginary line or a line on a map or chart connecting or marking places of equal barometric pressure

  2. 2 :  one of two or more atoms or elements having the same atomic weights or mass numbers but different atomic numbers



Illustration of isobar

Origin and Etymology of isobar

International Scientific Vocabulary is- + -bar (from Greek baros weight); akin to Greek barys heavy — more at grieve


First Known Use: circa 1864


ISOBAR Defined for Kids

isobar

play
noun iso·bar \ˈī-sə-ˌbär\

Definition of isobar for Students

  1. :  a line on a map to indicate areas having the same atmospheric pressure




Medical Dictionary

isobar

play
noun iso·bar \ˈī-sə-ˌbär\

Medical Definition of isobar

  1. :  one of two or more atoms or elements having the same atomic weights or mass numbers but different atomic numbers




Learn More about isobar


Seen and Heard

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

WORD OF THE DAY

a secret group of plotters

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

alphabet-pasta-spelling-help

Which is the correct spelling?

acommadate accommodate acommodate accomodate
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