The|se|um «thih SEE uhm», noun.
1. a temple or shrine dedicated to Theseus, the legendary hero and king of Athens.
2. a so-called temple of Theseus (now regarded as a temple of Hephaestus) at Athens, a beautiful Doric structure of Pentelic marble and the best-preserved of the Greek temples.
╂[< Latin Thēsēum < Greek Thēseîon Thesion < Thēseús Theseus]
Useful english dictionary. 2012.