castor

Từ điển Oxford Advanced Learner 8th

cas·tor [castor castors] (BrE) (NAmE cas·ter)BrE [ˈkɑːstə(r)] NAmE [ˈkæstər] noun
one of the small wheels fixed to the bottom of a piece of furniture so that it can be moved easily
See also: ↑caster

Word Origin:
late 17th cent. relating to a small container with holes in the top used for sprinkling: originally a variant of ↑caster, in the general sense ‘something that casts’.

• Từ đồng nghĩa / Synonyms:
  Castor, genus Castor, beaver, caster, Alpha Geminorum