Tresson, Fr. A net for the hair, worn by ladies in the Middle Ages. (See Calantica.)
Tressure, Her. A variety of the Orle, generally set round with fleurs-de-lys. A striking example is to be seen in the Royal Shield of Scotland, now displayed in the second quarter of the Royal Arms, blazoned as—Or, within a double Tressure flory; counterflory, a lion rampant guardant.
Trevat. A weaver’s cutting instrument for severing the pile-threads of velvet.
Triangle, Chr. An equilateral triangle is a symbol of the Holy Trinity, and therefore the motive, only second in frequency and importance to the Cross, of the construction and decoration of Christian churches.
Triangle. A musical instrument of early occurrence, producing sound by the striking of a metal triangle with a metal rod.
Triblet. A goldsmith’s tool used in making rings.
Tribometer. An instrument for estimating the friction of different metals.
Tribon, Gr. and R. (τρίβων). Literally, worn threadbare; and thence a coarse and common sort of mantle worn by the Spartans or by Romans who affected Spartan manners.
Tribula or Tribulum, R. (tero, to rub). An apparatus for threshing corn; consisting of a heavy platform armed with iron teeth or sharp flints.
Tribulus, R. (τρί-βολος, three-pointed). A Caltrap (q.v.).