Dictionary.com

Tsiolkovski

/ (Russian tsʌlˈkofskjɪ) /
Save This Word!

noun
Konstantin Eduardovich (kənstʌnˈtjin eduˈadəvɪtʃ). 1857–1935, Russian aeronautical engineer, a pioneer of rocket and space research. His work on liquid-fuelled rockets anticipated the ideas of Robert Goddard
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.
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