actinide

ac ti nide |ˈaktəˌnīd ˈæktənaɪd | ▶noun Chemistry any of the series of fifteen metallic elements from actinium (atomic number 89 ) to lawrencium (atomic number 103 ) in the periodic table. They are all radioactive, the heavier members being extremely unstable and not of natural occurrence. ORIGIN 1940s: from actinium + -ide, on the pattern of lanthanide .

actinide

actinide |ˈaktɪnʌɪd | ▶noun Chemistry any of the series of fifteen metallic elements from actinium (atomic number 89 ) to lawrencium (atomic number 103 ) in the periodic table. They are all radioactive, the heavier members being extremely unstable and not of natural occurrence. ORIGIN 1940s: from actinium + -ide, on the pattern of lanthanide .

Actinide

Ac ti ni de Pluralwort , die |Actin i de |die Actinide (Plural ) griechisch frühere Bezeichnung für die Gruppe der chemischen Elemente, die im Periodensystem vom Actinium bis zum Lawrencium reicht