castor

1 of 2

noun (1)

cas·​tor ˈka-stər How to pronounce castor (audio)
1
2
3
: a beaver hat

Castor

2 of 2

noun (2)

Cas·​tor ˈka-stər How to pronounce Castor (audio)
1
: one of the Dioscuri
2
: the more northern of the two bright stars in Gemini

Examples of castor in a Sentence

Recent Examples on the Web
These examples are automatically compiled from online sources to illustrate current usage. Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.
Noun
Shea butter and castor seed oil work wonders for conditioning, offering a flexible formula that's super easy to apply. Deanna Pai, Allure, 25 Sep. 2024 My mum mixes castor and coconut oil into one little pot for me. Varsha Patel, refinery29.com, 25 Sep. 2024 Rosemary, castor, and peppermint oils are known to promote hair growth, and this formula contains all three of them (*chef’s kiss*). Katie Decker-Jacoby, StyleCaster, 9 July 2024 This 6-fluid ounce budget option keeps frizz down while delivering maximum moisture through ingredients like shea butter, coconut oil, castor and flaxseed oils. Carrie Honaker, Southern Living, 24 June 2024 See all Example Sentences for castor 

Word History

Etymology

Noun (1)

Middle English, from Latin, from Greek kastōr, from Kastōr Castor

Noun (2)

Latin, from Greek Kastōr

First Known Use

Noun (1)

14th century, in the meaning defined at sense 1

Noun (2)

15th century, in the meaning defined at sense 1

Time Traveler
The first known use of castor was in the 14th century

Dictionary Entries Near castor

Cite this Entry

“Castor.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/castor. Accessed 5 Nov. 2024.

Kids Definition

Castor

noun
Cas·​tor ˈkas-tər How to pronounce Castor (audio)
: the more northern of the two bright stars in Gemini
Etymology

Noun

from Greek Kastōr (name of one of the twin heroes in mythology) see Word History at gemini

More from Merriam-Webster on castor

Last Updated: - Updated example sentences
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