Definition of megaparsec
: a unit of measure for distances in intergalactic space equal to one million parsecs
Test Your Vocabulary
Eponyms: Words Named After People
-
- What is the best definition of boycott?

Test your knowledge - and maybe learn something along the way.
TAKE THE QUIZ
A daily challenge for crossword fanatics.
TAKE THE QUIZLove words? Need even more definitions?
Merriam-Webster unabridged
Share megaparsec
Time Traveler for megaparsec
The first known use of megaparsec was in 1920
See more words from the same year