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
Noun
It’s formulated with a deeply nourishing castor seed oil that softens the lips and hydrates over time. Jessie Quinn, Peoplemag, 13 Jan. 2024 Castor oil is made from pressing seeds from the castor plant. Kaitlin Vogel, Health, 29 Sep. 2023 On Sephora Goop Beauty Clean Nourishing Lip Balm is a lip-saver with its soft and silky moisturizing base containing shea butter, plus coconut, jojoba, argan, sunflower, and castor seed oils. Katherine Alex Beaven, Travel + Leisure, 19 Oct. 2023 As its name suggests, this shampoo is enriched with castor seed oil, which is known for its ability to enhance hair growth and deep-condition strands. Jessie Quinn, Peoplemag, 19 Oct. 2023 One pass with a cotton pad eliminates all evidence of past color, without making your nails feel brittle (thanks to castor and grapefruit peel oils) or your bathroom smell like a distillery. Liana Schaffner, Allure, 21 Sep. 2023 Sacks likes castor or almond oil to create the same protective barrier on the brow and to help the tint from fading too fast. Audrey Noble, Harper's BAZAAR, 6 Sep. 2023 The formula is all grown up, with synthetic beeswax and castor seed oil to keep skin and lips moisturized in the driest offices. Kaitlyn McInnis, Better Homes & Gardens, 8 Sep. 2023 This formula has a thick and glossy consistency that provides a nice layer of high shine while also nourishing with ingredients such as apricot kernel oil, castor seed oil, rosa canine seed oil, avocado oil, and raspberry seed oil. Jessie Quinn, Peoplemag, 5 Sep. 2023 See More

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'castor.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

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 28 Feb. 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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