Dictionary.com

protoactinium

[ proh-toh-ak-tin-ee-uhm ]
/ ˌproʊ toʊ ækˈtɪn i əm /
Save This Word!

noun Chemistry.
QUIZ
WILL YOU SAIL OR STUMBLE ON THESE GRAMMAR QUESTIONS?
Smoothly step over to these common grammar mistakes that trip many people up. Good luck!
Question 1 of 7
Fill in the blank: I can’t figure out _____ gave me this gift.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022

British Dictionary definitions for protoactinium

protoactinium
/ (ˌprəʊtəʊækˈtɪnɪəm) /

noun
the former name of protactinium
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
FEEDBACK