SINCE 1828
Cepheid
noun
Ce·phe·id
| \ ˈse-f(ē-)id
, ˈsē-
\
, ˈsē-
\
Definition of Cepheid
: any of a class of variable stars whose very regular light variations are related directly to their intrinsic luminosities and whose apparent luminosities are used to estimate distances in astronomy
Keep scrolling for more
Comments on Cepheid
What made you want to look up Cepheid? Please tell us where you read or heard it (including the quote, if possible).
Test Your Vocabulary
Words from Greek and Latin Quiz
-
- Which of the following months comes from a Latin word for “ten”?
Test your vocabulary with our 10-question quiz!
TAKE THE QUIZ
Test Your Knowledge - and learn some interesting things along the way.
TAKE THE QUIZLove words? Need even more definitions?
Merriam-Webster unabridged
Words at Play
Ask the Editors
Word Games
-
Words from Greek and Latin Quiz
Finally! A use for those SAT prep classes.
Take the quiz -
Name That Thing: Animal Edition
How many animals can you identify?
Take the quiz -
How Strong Is Your Vocabulary?
Test your vocabulary with our 10-question quiz!
Take the quiz -
Dictionary Devil
The dictionary has been scrambled—can you put it back together?
Play the game
Share Cepheid
Resources for Cepheid