- Learn English
-
Learn grammar
-
List of words
-
Study your cards
-
Hang On, Man!
-
Audio Books
-
More apps
- Recent searches
-
daily
-
piggyback
-
yellow
-
neurasthenic
-
shadow
-
juvenile
-
cricket
-
sauvignon grape
-
mutation
-
savvy
- 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