control rod

noun
plural control rods

Definition of control rod

: a rod of a neutron-absorbing material (such as boron carbide) used to regulate the rate of nuclear fission in a reactor

First Known Use of control rod

1906, in the meaning defined above

Learn More About control rod

Time Traveler for control rod

Time Traveler

The first known use of control rod was in 1906

See more words from the same year

Dictionary Entries Near control rod

control panel

control rod

control room

See More Nearby Entries 

Statistics for control rod

Cite this Entry

“Control rod.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/control%20rod. Accessed 28 Jan. 2022.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon

WORD OF THE DAY

Test Your Vocabulary

Name that Thing: Flower Edition

True or False

Test your knowledge - and maybe learn something along the way.

TAKE THE QUIZ
Universal Daily Crossword

A daily challenge for crossword fanatics.

TAKE THE QUIZ
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!