The symbol for the asteroid 29 Amphitrite.
Chauncey A. Goodrich and Noah Porter, editors
1884
Webster's Complete Dictionary of the English Language<i>, p. 1780. <a rel="nofollow" class="external autonumber" href="https://books.google.com/books?id=ql4IAAAAQAAJ&amp;pg=PA1780">[1]</a></i>