| toxicology |
the science that deals with poisons and the detection and treatment of poisoning. |
| toxic-shock syndrome |
a sometimes fatal disease, esp. contracted by young women during menstruation, characterized by fever, vomiting, and diarrhea, and thought to be connected with the use of certain tampons that cause a rapid spread of bacterial infection in the vagina. |
| toxin |
any of a group of poisonous substances secreted by microorganisms. [2 definitions] |
| toxo- |
variant of toxico-. |
| toxoid |
a toxin, used in immunization, that has been rendered nontoxic by chemical or physical means but that retains its capacity to stimulate the production of antibodies. |
| toy |
any object, device, or the like that can be used in play, esp. by children; plaything. [7 definitions] |
| toyon |
a California evergreen, related to the rose, that bears clusters of white flowers and bright red berries. |
| toyshop |
a store in which toys are sold or a workshop in which they are made. |
| tr. |
abbreviation of "transitive," in grammar, indicating a verb that takes a direct object, such as "get." [2 definitions] |
| tra- |
across; over. |
| trabeated |
using horizontal beams or lintels as supports instead of arches. [2 definitions] |
| trace1 |
a visible mark or evidence of a past event or of something having been present. [11 definitions] |
| trace2 |
one of two ropes, chains, or straps used to harness a draft animal to a cart, carriage, or the like. |
| trace element |
a chemical element found in minute quantities in a substance, such as plant or animal tissue or soil. |
| tracer |
someone or something that traces. [3 definitions] |
| tracery |
an ornamental pattern of branching and interlaced bars or ribs, as in a Gothic window. [2 definitions] |
| trachea |
the tube in air-breathing animals that carries air to the lungs; windpipe. [2 definitions] |
| tracheo- |
trachea. |
| tracheotomy |
the surgical opening of the trachea through the outside of the neck. |
| trachoma |
a contagious bacterial eye infection, affecting the conjunctiva and cornea, that is characterized by inflammation, granulation, and eventual scarring. |
| tracing |
the act or process of drawing, reproducing, or recording by tracing. [2 definitions] |