- Learn English
-
Learn grammar
-
List of words
-
Study your cards
-
Hang On, Man!
-
Audio Books
-
More apps
- Recent searches
-
marseilles
-
plan
-
accounts executive
-
put up
-
colloquial
-
opium
-
bowling
-
acetic anhydride
-
apse
-
approach
- Hide translation
actinon
actinon /ˈækˌtɪnɒn/
noun
-
Any of a series of radioactive elements with atomic numbers 89 through 103
(
actinide
, actinoid
, actinon
)
any of a series of radioactive elements with atomic numbers 89 through 103