Tartaric acid: A vegetable acid which exists in the grape.

Technology: A description of the arts, considered generally in their theory and practice as connected with moral, political, and physical science.

Three-ply or triple ingrain: A kind of carpeting, in which the threads are woven in such a manner as to make three thicknesses of the cloth.

Tic douloureux: A painful affection of the nerves, mostly those of the face.

Tocqueville, (Alexis de:) A celebrated statesman and writer of France, and author of volumes on the political condition, and the penitentiaries of the United States, and other works.

Trachea: The windpipe, so named (from a Greek word signifying rough) from the roughness or inequalities of the cartilages of which it is formed.

Truckle-bed or Trundle-bed: A bed that runs on wheels.

Tuber: A solid, fleshy, roundish root, like the potato.

Tuberous: Thick and fleshy; composed of or having tubers.

Tucks, (improperly Tacks): Folds in garments.