castor sugar

noun

variants or caster sugar
chiefly British
: finely granulated white sugar

Examples of castor sugar in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
The explosive mixture, resembling castor sugar, lay on the floor in paper sacks. Simon Shuster, The Atlantic, 27 Mar. 2026

Word History

Etymology

caster

First Known Use

1855, in the meaning defined above

Time Traveler
The first known use of castor sugar was in 1855

Browse Nearby Words

Cite this Entry

“Castor sugar.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/castor%20sugar. Accessed 3 Apr. 2026.

Love words? Need even more definitions?

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

More from Merriam-Webster