- Learn English
-
Learn grammar
-
List of words
-
Study your cards
-
Hang On, Man!
-
Audio Books
-
More apps
- Recent searches
-
thinking
-
john l. h. down
-
abashed
-
debut
-
jitters
-
allegiance
-
pitcherful
-
withdrawal
-
self-renunciation
-
attitude
- 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