To save this word, you'll need to log in.
\ ˈāˌ- \
Definition of A battery
: a battery used to heat the filaments or cathode heaters of electron tubes
— called also filament battery
— compare b batteryKeep scrolling for more
Comments on A battery
What made you want to look up A battery? Please tell us where you read or heard it (including the quote, if possible).
Test Your Vocabulary
More Confusing Words—Quiz
- The magician
______moved the selected card to the top of the deck.
Can you spell these 10 commonly misspelled words?
TAKE THE QUIZ
Test Your Knowledge - and learn some interesting things along the way.
TAKE THE QUIZLove words? Need even more definitions?
Merriam-Webster unabridgedWords at Play
Ask the Editors
Word Games
- More Confusing Words—Quiz
How many of these commonly confused words do you know?
Take the quiz - Name that Thing: Toys and Games Edition
It's all fun and games until someone beats your high score.
Take the quiz - Spell It
Can you spell these 10 commonly misspelled words?
Take the quiz - Add Diction
Build a chain of words by adding one letter at a time.
Play the game
Share A battery
Time Traveler for A battery
The first known use of A battery was in 1917
See more words from the same year