- Learn English
-
Learn grammar
-
List of words
-
Study your cards
-
Hang On, Man!
-
Audio Books
-
More apps
- Recent searches
-
die down
-
reproducer
-
put in
-
accounting system
-
ordain
-
pail
-
pint
-
tv
-
department store
-
manganese bronze
- Hide translation
actinide
actinide /ˈækˈtɪnˌaɪd/
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