- Learn English
-
Learn grammar
-
List of words
-
Study your cards
-
Hang On, Man!
-
Audio Books
-
More apps
- Recent searches
-
board
-
adaptive
-
adelges abietis
-
blunders
-
adder's tongue
-
hoi polloi
-
abetter
-
jewish rye
-
add up
-
adelges
- Hide translation
acorn tube
acorn tube /ˈeɪˌkɔrn tuːb/
noun
-
A small vacuum tube; used at high frequencies
(
acorn tube
)
a small vacuum tube; used at high frequencies