optime
A student who graduates with second class ("senior optime") or third class ("junior optime") honours in mathematics, or (loosely) in any other subject.
The winning of even a single optime was very rare. Upon winning the second optime, Hamilton “became a celebrity in the intellectual circle of Dublin; and invitations, embarrassing from their number, poured in upon him. . .” (2,I; 209)
Where it comes from
Borrowed from Latin optimē (“very well”), in the phrase optimē disputāstī (“you have disputed very well”), formerly used in reporting results at Cambridge.
Adapted from the Wiktionary entry optime (CC BY-SA 4.0).