Most often exclamatio is simply the Latin term for ecphonesis (an emotional exclamation); however, it has also been used (as in the Ad Herennium) to indicate apostrophe.
Melanchthon places exclamatio among the figures of thought (See Figures of Speech and Thought).
Example
O tempora! O mores! —Cicero
Sources: Ad Herennium 4.15.22; Melanch. IR c7v.
This work is licensed under a Creative Commons Attribution 3.0 License. Gideon O. Burton, Brigham Young University Please cite "Silva Rhetoricae" (rhetoric.byu.edu)
Most often exclamatio is simply the Latin term for 