pos·te·ri·or (pŏ-stîrē-ər, pō-)
1. Located behind a part or toward the rear of a structure.
2. Relating to the caudal end of the body in quadrupeds or the back of the body in humans and other primates.
3. Botany Next to or facing the main stem or axis.
4. Coming after in order; following.
5. Following in time; subsequent.
[Latin, comparative of posterus, coming after, from post, afterward; see apo- in the Appendix of Indo-European roots.]
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2018 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.