1. One that casts: a caster of nets.
2. also cas·tor (kăstər) A small wheel on a swivel, attached under a piece of furniture or other heavy object to make it easier to move.
3. also castor
a. A small bottle, pot, or shaker for holding a condiment.
b. A stand for a set of condiment containers.
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2020 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.