aegrotat
Concise Oxford English Dictionary © 2008 Oxford University Press:
aegrotat /ˈʌɪgrə(ʊ)tat, ˈiːgrə(ʊ)-/
▶noun Brit. a certificate stating that a student is too ill to take an exam.
– origin C18: L., lit. ‘he is sick’.
'aegrotat' also found in these Oxford entries:

