actinide series

Noun	1.	actinide series - a series of 15 radioactive elements with increasing atomic numbers from actinium to lawrencium series - similar things placed in order or happening one after another; "they were investigating a series of bank robberies"
	2.	actinide series - (chemistry) a series from actinium to lawrencium of 15 radioactive elements with increasing atomic numbers chemical science, chemistry - the science of matter; the branch of the natural sciences dealing with the composition of substances and their properties and reactions series - similar things placed in order or happening one after another; "they were investigating a series of bank robberies"

Word Browser