Defn: An actor.

THESSALIAN
Thes*sa"li*an, a. Etym: [Cf. L. Thessalius.]

Defn: Of or pertaining to Thessaly in Greece. Shak.
— n.

Defn: A native or inhabitant of Thessaly.

THESSALONIAN
Thes`sa*lo"ni*an, a.

Defn: Of or pertaining to Thessalonica, a city of Macedonia.
— n.

Defn: A native or inhabitant of Thessalonica.

THETA
The"ta, n. Etym: [L., fr. Gr. qh a, the Greek letter th,

Defn: A letter of the Greek alphabet corresponding to th in English; — sometimes called the unlucky letter, from being used by the judges on their ballots in passing condemnation on a prisoner, it being the first letter of the Greek qa`natos, death. Theta function (Math.), one of a group of functions used in developing the properties of elliptic functions.

THETICAL
Thet"ic*al, a. Etym: [Gr. Thesis.]