(, theta). The sign given in the verdict of the Areopagus of condemnation to death.
“Et potis es vitio nigrum praeflgere theta.” —Persius.
T meant absolution, and A = non liquet. In the Roman courts C meant condemnation, A absolution, and N L (non liquet) remanded.
Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894