cas·tor 1 
(kăstər)
(kăstər)n.
1. An oily, brown, odorous substance obtained from glands in the groin of the beaver and used as a perfume fixative. Also called castoreum.
2. A hat made of beaver fur or an imitation.
3. A heavy wool fabric used especially for overcoats.
[Middle English, from Latin, beaver, from Greek kastōr.]
- irreducibleness
- irreducibly
- irrefragability
- irrefragable
- irrefragably
- irrefrangible
- irrefrangibly
- irrefutability
- irrefutable
- irrefutably
- irreg.
- irregardless
- irregular
- irregular galaxy
- irregularity
- irregularly
- irrelative
- irrelatively
- irrelevance
- irrelevancy
- irrelevant
- irrelevantly
- irreligion
- irreligious
- irreligiously