Quadragesimus Quintus: June 27, 2008: Ater
ater, atra, atrum
Definition: black, dark; gloomy, dismal; malicious
Sententia: Atra fele visa, puella putavit nunc se malam fortunam habituram.
With the black cat having been seen, the girl thought that she now would have bad luck.
This word is found in Pyramus and Thisbe in Ovid's Metamorphoses and a LOT all over the Aeneid.
NB: Bold and underline == macron