Anagrams of: EUROPIUM

• a bivalent and trivalent metallic element of the rare earth group

• an official at a baseball game

• someone chosen to judge and decide a disputed issue

• be a referee or umpire in a sports competition

• combined with extraneous elements

• (used of persons or behaviors) immoral or obscene

• having a physical or moral blemish so as to make impure according to dietary or ceremonial laws

• of or relating to or being an integer that cannot be factored into other integers

• a natural number that has exactly two distinct natural number divisors: 1 and itself

• the period of greatest prosperity or productivity

• the second canonical hour; about 6 a.m.

• the time of maturity when power and vigor are greatest

• first in rank or degree

• used of the first or originating agent

• of superior grade

• being at the best stage of development

• insert a primer into (a gun, mine, or charge) preparatory to detonation or firing

• cover with a primer; apply a primer to

• fill with priming liquid

• the principal part of a duet (especially a piano duet)

• the best of its kind

• An introduction, preface or preamble.

• a composition written in metrical feet forming rhythmical lines

• a formal ball held for a school class toward the end of the academic year