TETRAEDRON, (Tetraëdre, Fr.) In geometry, one of the five regular bodies. It is a pyramid which is terminated by four equilateral triangles, that are equal to each other; in the same manner that the tetragon is a recontilineal figure of four equal sides, which has four right angles.

TETRAGONAL. Square, having equal sides and angles.

TETRARCH. A Roman governor of the fourth part of a province.

TEUTONIC, (Teutonique, Fr.) See [Orders].

TEVEEL, Ind. The treasury.

TEVEELDAR, Ind. The treasurer.

THANE. An ancient military title of honor, now obsolete.

To THANK. In military matters, to make honorable mention of a person or persons for having behaved gallantly in an action, or otherwise rendered a public service.

To be Thanked. To receive a public testimony of good conduct. Officers, &c. are generally thanked in public orders.

Thanks. Public acknowlegements for gallant actions.