- Learn English
-
Learn grammar
-
List of words
-
Study your cards
-
Hang On, Man!
-
Audio Books
-
More apps
- Recent searches
-
spellbound
-
action movie
-
sculpturesque
-
love
-
addressing machine
-
snowflake
-
acetate rayon
-
loftiest
-
hairs
-
flavoures
- 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