| She issued an order, therefore, that for a certain time upsilon was to have no playthings. |
| Similarly, the bottom quark was inferred from the discovery of the upsilon particle by Leon Lederman in 1977 at Fermilab. |
| The underlying phonology of the sound marked by the upsilon of sun is ambiguous. |
| This species is the ypsilon of Borkhausen, and the upsilon of other authors. |
| The letters Y and Z were later added to represent Greek letters, upsilon and zeta respectively, in Greek loanwords. |
| Some colleagues were surprised that he had not won a Nobel earlier, perhaps for the discovery in 1977 of the upsilon particle, the most massive nuclear particle yet found. |
