- Learn English
-
Learn grammar
-
List of words
-
Study your cards
-
Hang On, Man!
-
Audio Books
-
More apps
- Recent searches
-
fast
-
bbfc
-
cougar
-
degenerative joint disease
-
past
-
rime
-
rapture
-
analgesic
-
triceps
-
parliament
- 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