1906, in the meaning defined above
Share control rod
Time Traveler for control rod
See more words from the same year
Cite this Entry
“Control rod.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/control%20rod. Accessed 28 Jan. 2022.
See Definitions and Examples »
Get Word of the Day daily email!
Name that Thing: Flower Edition
Test your knowledge - and maybe learn something along the way.
A daily challenge for crossword fanatics.
Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!
Top 10 Latin Phrases
We all want fewer problems and less trouble with ...
'Smatchet', 'Fustilugs', and more
Both are used, but home in does a better job of...
A simple trick to keep them separate
How 'literally' can mean "figuratively"
How to use a word that (literally) drives some pe...
The awkward case of 'his or her'
Updated with more commonly confused words!
Take the quiz
A warm and toasty quiz to nestle into
Test your knowledge - and maybe learn something a...