castor

noun8

1. •
   (UK) A pivoting roller attached to the bottom of furniture to allow it to be moved.
2. •
   (UK) A container with a perforated cap for sprinkling its contents, especially salt, pepper, etc.
3. •
   (UK) Alternative spelling of caster, especially in its senses
4. •
   Castoreum (bitter exudate of mature beavers).
5. •
   A hat made from the fur of the beaver.

   • I have been always noted for the jaunty manner in which I wear my castor—[…] — 1826
6. •
   Any of various nymphalid butterflies of the genus Ariadne, of Africa and Asia.
7. •
   A heavy quality of broadcloth for overcoats.
8. •
   A variety of petalite found in Elba.