- Learn English
-
Learn grammar
-
List of words
-
Study your cards
-
Hang On, Man!
-
Audio Books
-
More apps
- Recent searches
-
connection
-
criminals
-
rh
-
carpocapsa pomonella
-
napkin
-
adelges piceae
-
adductor muscle
-
pop
-
brakeman
-
molecule
- 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