1870, George Long, s.n. "Seneca, L. Annaeus", page 781 in Dictionary of Greek and Roman Biography and Mythology, volume III. Apocolocyntosis, is a satire against the emperor Claudius. The word is a play on the term Apotheosis or deification, and is equivalent in meaning to Pumpkinification, or the reception of Claudius among the pumpkins.
Source: wiktionary