actino-uranium
/ˌaktɪnə(ʊ)jʊˈreɪnɪəm/Chemistry and Physics. Now historical
noun
The (fissile) isotope of uranium of mass number 235.
- A higher mass number was at first inferred for this isotope..
Origin
Early 20th century; earliest use found in Science. From actin- + -o- + uranium, after French actinuranium; so called because actinium results from the radioactive decay of this isotope.
- sans-culotte
- sans-culottism
- San Sebastián
- sansei
- sanserif
- sanseveria
- sansevieria
- San Simeon
- Sanskrit
- Sanskritic
- Sanskritist
- Sansovino, Jacopo Tatti
- sans serif
- sant
- Santa
- Santa Ana
- Santa Anna, Antonio López de
- Santa Barbara
- Santa Barbara Islands
- Santa Catalina
- Santa Catarina
- Santa Clara
- Santa Clarita
- Santa Claus
- Santa Cruz