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testimonial a formal statement testifying to a specific fact. [4 definitions]
testimony the evidence presented under oath in a court of law. [3 definitions]
testing the act or practice of administering or undergoing a test or tests.
testis a testicle.
testosterone a steroid hormone produced in the testes that is responsible for stimulating the development of male sex organs, secondary sex characteristics, and sperm.
test pilot a pilot who flies new or experimental aircraft to examine their conformity to design standards and ascertain their fitness for use.
test tube a thin hollow glass cylinder, closed at one end, that is used chiefly in biological and chemical laboratories, esp. in conducting experiments.
test-tube made in or as if in a test tube; synthetic or artificial. [2 definitions]
testudo a movable fireproof shelter, sometimes formed by overlapping shields, that was held by ancient Roman foot soldiers during sieges.
testy easily annoyed or angered; irritable; touchy. [2 definitions]
Tet the festival of the lunar New Year, celebrated by the Vietnamese.
tetanus an often fatal infectious disease involving rigidness and spasms of the muscles, esp. in the neck and lower jaw, and caused by a bacterium that usu. gains entry to the body through a wound. [2 definitions]
tête-à-tête a conversation between two people in private. [3 definitions]
teth the name of the ninth letter of the Hebrew alphabet.
tether a rope, chain, leash, or the like by which an animal, balloon, or other moving or movable object is fastened. [2 definitions]
tetherball a game, usu. played by two people, in which a ball suspended by a cord from a post is hit with the hand or a paddle, the object being to wrap the cord fully around the post.
Teti the first pharaoh of Egypt's Sixth Dynasty, reigning in the middle of the third millenium B.C.E. (2345 B.C.E.?-- 2333 B.C.E?).
tetra any of several small brightly colored tropical fish that are common in fresh water aquariums.
tetra- four.
tetracycline an antibiotic derived from certain microorganisms or synthesized, used to treat many different infections.
tetrad a group or set of four. [3 definitions]