- Learn English
-
Learn grammar
-
List of words
-
Study your cards
-
Hang On, Man!
-
Audio Books
-
More apps
- Recent searches
-
self-possessed
-
duvet
-
slider
-
submaxilla
-
acinus
-
thirty-eight
-
active power
-
zumba
-
condemnation
-
docket
- 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