Castor /kasˈtör or -tər/

1. One of the Dioscuri, twin brother of Pollux, son of Leda, renowned for his skill in horse-taming (Gr myth)
2. A bright star in the constellation Gemini (the Twins)

castor¹ or caster /käˈstər/

1. A small swivelling wheel attached to furniture and trolleys with its hub displaced away from the swivel axis, so that movement in any direction causes the wheel to follow this axis
2. A vessel with perforated top for sprinkling sugar, etc

castor action or caster action noun (motoring)

The use of inclined swivel axes or kingpins to give the steerable front wheels a self-centring tendency after angular deflection

castor sugar or caster sugar noun

White granulated sugar crushed to form fine grains

castor² /käˈstər/

1. The beaver (genus Castor)
2. Castoreum
3. A hat of beaver or similar fur

castoreum /-tōˈri-əm or -töˈ/ noun

The dried perineal sacs of the beaver, or a brown unctuous strong-smelling substance obtained from them, formerly used in medicine and perfumery

casˈtory noun (Spenser)

A red or pink colour obtained from castoreum

castor³ /käˈstər/ (obs Aust sl)

1. Good
2. Excellent

• benzene hexachloride
• benzene ring
• benzene rings
• benzenes
• benzidine
• benzidines
• benzil
• benzils
• benzine
• benzines
• benzoate
• benzoates
• benzocaine
• benzocaines
• benzodiazepine
• benzodiazepines
• benzoic
• benzoic acid
• benzoin
• benzoins
• benzol
• benzole
• benzoles
• benzoline
• benzolines