1. Of, resembling, or produced by apoplexy: an apoplectic fit.
a. Having or inclined to have apoplexy.
b. Exhibiting symptoms associated with apoplexy.
3. Extremely angry; furious: "His accounts of the battles in 1812 left some veterans apoplectic with rage" (Rosamund Bartlett).
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2019 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.