a beaver, a type of wheel or a small ball fixed to the bottom of furniture or equipment to make it easier to move, a brownish oily substance with a strong smell, used in medicine and perfumes

castor sugar, castor bean, castor cup

Formal and Informal Expressions of castor

In different contexts, you can replace 'castor' with suitable alternatives. In a more formal setting, 'beaver, wheel' is apt. In informal speech or writing, 'ball' is a commonplace synonym.

castor: Explore its Definition & Usage

castor Definition

1a beaver
2a type of wheel or a small ball fixed to the bottom of furniture or equipment to make it easier to move
3a brownish oily substance with a strong smell, used in medicine and perfumes

Using castor: Examples

Take a moment to familiarize yourself with how "castor" can be used in various situations through the following examples!

Example
The castor on the chair made it easy to move around.
Example
Castor oil is used as a laxative.
Example
Beavers are known for their impressive dams and lodges.

castor Synonyms and Antonyms

Synonyms for castor

Phrases with castor

castor sugar
a very fine sugar used in baking
Example
The recipe calls for castor sugar instead of regular granulated sugar.
castor bean
the seed of a plant that is the source of castor oil
Example
Castor beans are highly toxic and should not be ingested.
castor cup
a small cup-shaped device with a caster in the center, used to support furniture legs
Example
The castor cups under the piano legs made it easy to move the instrument around.

Origins of castor

from Old French 'castor', from Latin 'castor', meaning 'beaver'

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Summary: castor in Brief

The term 'castor' [ˈkæstər] refers to a beaver, a type of wheel or ball attached to furniture or equipment to make it easier to move, and a brownish oily substance used in medicine and perfumes. Castor extends into phrases like 'castor sugar' and 'castor bean,' denoting fine sugar and the seed of a plant that is the source of castor oil, respectively.