protactinium

Noun

a short-lived radioactive metallic element formed from uranium and disintegrating into actinium and then into lead
A chemical element (symbol Pa) with atomic number 91: a dense, silvery-gray actinide metal.

Origin / Etymology

From proto- + actinium.

Synonyms

atomic number 91, Pa, protoactinium

Scrabble Score: 18

protactinium: valid Scrabble (US) TWL Word
protactinium: valid Scrabble Word in Merriam-Webster MW Dictionary
protactinium: valid Scrabble Word in International Collins CSW Dictionary

Words With Friends Score: 23

protactinium: valid Words With Friends Word