- Learn English
-
Learn grammar
-
List of words
-
Study your cards
-
Hang On, Man!
-
Audio Books
-
More apps
- Recent searches
-
gainsay
-
emerging
-
activistic
-
conjugation
-
imam
-
acute kidney failure
-
buffalo clover
-
abul-walid mohammed ibn-ahmad ibn-mohammed ibn-roshd
-
resurrection
-
bear down on
- Hide translation
actinium
actinium /ækˈtɪnɪəm/
noun
-
A radioactive element of the actinide series; found in uranium ores
(
Ac
, actinium
, atomic number 89
)
a radioactive element of the actinide series; found in uranium ores
