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Thereby

By that; by that means; in consequence of that.

Therefore

For that or this reason, referring to something previously stated; for that.

Therein

In that or this place, time, or thing; in that particular or respect.

Thereinto

Into that or this, or into that place.

Theretofore

Up to that time; before then; -- correlative with heretofore.

Thereunto

Unto that or this; thereto; besides.

Therf

Not fermented; unleavened; -- said of bread, loaves, etc.

Theriaca Theriac

An ancient composition esteemed efficacious against the effects of poison; especially, a certain compound of sixty-four drugs, prepared, pulverized, and reduced by means of honey to an electuary; -- called also theriaca Andromachi, and Venice treacle.

Theriodont

One of the Theriodontia. Used also adjectively.

Theriodontia

An extinct order of reptiles found in the Permian and Triassic formations in South Africa. In some respects they resembled carnivorous mammals. Called also Theromorpha.

Therm

one of several units of heat, especially one equivalent to 1000 large calories, or 100,000 British thermal units.

Thermae

Springs or baths of warm or hot water.

Thermal

Of or pertaining to heat; warm; hot; as, the thermal unit; thermal waters.

Thermantidote

A device for circulating and cooling the air, consisting essentially of a kind of roasting fan fitted in a window and incased in wet tatties.

Thermetograph

A self-registering thermometer, especially one that registers the maximum and minimum during long periods.

Thermic

Of or pertaining to heat; due to heat; thermal; as, thermic lines.

Thermidor

The eleventh month of the French republican calendar, -- commencing July 19, and ending August 17. See the Note under Vend/miaire.

Thermifugine

An artificial alkaloid of complex composition, resembling thalline and used as an antipyretic, -- whence its name.

Thermobarograph

An instrument for recording simultaneously the pressure and temperature of a gas; a combined thermograph and barograph.

Thermobarometer

An instrument for determining altitudes by the boiling point of water.

Thermochemistry

That branch of chemical science which includes the investigation of the various relations existing between chemical action and that manifestation of force termed heat, or the determination of the heat evolved by, or employed in, chemical actions.

Thermochroic

Pertaining to or designating heat rays that have undergone selective absorption and are therefore analogous to colored light rays.

Thermochrosy

The property possessed by heat of being composed, like light, of rays of different degrees of refrangibility, which are unequal in rate or degree of transmission through diathermic substances.

Thermocurrent

A current developed or set in motion by heat; specif., an electric current, in a heterogeneous circuit, due to differences of temperature between the junctions of the substances of which the circuit is composed.

Thermodin

A white crystalline substance derived from urethane, used in medicine as an antipyretic, etc.

Thermodynamic

Relating to thermodynamics; caused or operated by force due to the application of heat.

Thermodynamics

The science which treats of the mechanical action or relations of heat.

Thermoelectric

Pertaining to thermoelectricity; as, thermoelectric currents.

Thermoelectricity

Electricity developed in the action of heat. See the Note under Electricity.

Thermoelectrometer

An instrument for measuring the strength of an electric current in the heat which it produces, or for determining the heat developed by such a current.

Thermogen

Caloric; heat; regarded as a material but imponderable substance.

Thermogenic

Relating to heat, or to the production of heat; producing heat; thermogenous; as, the thermogenic tissues.

Thermogram

The trace or record made by means of a thermograph.

Thermograph

An instrument for automatically recording indications of the variation of temperature.

Thermography

Any process of writing involving the use of heat.

Thermojunction

A junction of two dissimilar conductors used to produce a thermoelectric current, as in one form of pyrometer; a thermocouple.

Thermoluminescence

Luminescence exhibited by a substance on being moderately heated. It is shown esp. by certain substances that have been exposed to the action of light or to X-rays.

Thermolysin

a proteolytic enzyme obtained from the bacterium Bacillus thermoproteolyticus, which hydrolyses the N-terminal amide bonds of hydrophobic amino acid residues in proteins. It is used in studies of protein structure. It has a molecular weight of about 37,500 and contains zinc and calcium in its active configuration.

Thermolysis

The resolution of a compound into parts by heat; dissociation by heat.

Thermolyze

To subject to thermolysis; to dissociate by heat.

Thermomagnetism

Magnetism as affected or caused by the action of heat; the relation of heat to magnetism.

Thermometer

An instrument for measuring temperature, founded on the principle that changes of temperature in bodies are accompanied by proportional changes in their volumes or dimensions.

Thermometrograph

An instrument for recording graphically the variations of temperature, or the indications of a thermometer.

Thermometry

The estimation of temperature by the use of a thermometric apparatus.

Thermoneurosis

A neurosis caused by exposure to heat. A neurosis causing a rise or fall of a body's temperature.

Thermophilic

Heat-loving; -- applied especially to microorganisms such as certain bacteria, fungi and algae, which grow best at temperatures above 40/ C (e.g. between 50/ and 60/), and in some cases at temperatures that would kill ordinary microorganisms. They are found in naturally hot locations, such as at hot springs or the thermal vents at the ocean bottom.

Thermophone

A portable form of telethermometer, using a telephone in connection with a differential thermometer.

Thermophore

An apparatus for conveying heat, as a case containing material which retains its heat for a considerable period.

Thermopile

An instrument of extreme sensibility, used to determine slight differences and degrees of heat. It is composed of alternate bars of antimony and bismuth, or any two metals having different capacities for the conduction of heat, connected with an astatic galvanometer, which is very sensibly affected by the electric current induced in the system of bars when exposed even to the feeblest degrees of heat.

Thermoregulator

A device for the automatic regulation of temperature; a thermostat.

Thermoscope

An instrument for indicating changes of temperature without indicating the degree of heat by which it is affected; especially, an instrument contrived by Count Rumford which, as modified by Professor Leslie, was afterward called the differential thermometer.

Thermoscopic

Of or pertaining to the thermoscope; made by means of the thermoscope; as, thermoscopic observations.

Thermosiphon

An arrangement of siphon tubes for assisting circulation in a liquid.

Thermostable

Capable of being heated to or somewhat above 55/ C. without loss of special properties; -- said of proteins, immune substances, etc.

Thermostat

A device which automatically regulates temperature, or provides a signal used by another device to regulate temperature. The temperature-sensitive signal may be electronic, as that produced by a thermocouple. The signal may also be caused mechanically, as by the unequal expansion of different metals, liquids, or gases by heat, which can then cause the opening or closing of the damper of a stove, or the like, as the heat becomes greater or less than is desired.

Thermostatic

Of or pertaining to the thermostat; made or effected by means of the thermostat.

Thermosystaltic

Influenced in its contraction by heat or cold; -- said of a muscle.

Thermotank

A tank containing pipes through which circulates steam, water, air, or the like, for heating or cooling; -- used in some heating and ventilation systems.

Thermotaxic

Pertaining to, or connected with, the regulation of temperature in the animal body; as, the thermotaxic nervous system.

Thermotaxis

The property possessed by protoplasm of moving under the influence of heat. Determination of the direction of locomotion by heat.

Thermotensile

Pertaining to the variation of tensile strength with the temperature.

Thermotension

A process of increasing the strength of wrought iron by heating it to a determinate temperature, and giving to it, while in that state, a mechanical strain or tension in the direction in which the strength is afterward to be exerted.

Thermotonus

A condition of tonicity with respect to temperature.

Thermotropism

The phenomenon of turning towards a source of warmth, seen in the growing parts of some plants.

Thermotype

A picture (as of a slice of wood) obtained by first wetting the object slightly with hydrochloric or dilute sulphuric acid, then taking an impression with a press, and next strongly heating this impression.

Thermotypy

The art or process of obtaining thermotypes.

Thermovoltaic

Of or relating to heat and electricity; especially, relating to thermal effects produced by voltaic action.

Theroid

Resembling a beast in nature or habit; marked by animal characteristics; as, theroid idiocy.

Theropoda

An order of carnivorous dinosaurs in which the feet are less birdlike, and hence more like those of an ordinary quadruped, than in the Ornithopoda. It includes the rapacious genera Megalosaurus, Creosaurus, and their allies.

Thesaurus

A treasury or storehouse; hence, a repository, especially of knowledge; -- often applied to a comprehensive work, like a dictionary or cyclopedia.

These

The plural of this. See This.

Thesicle

A little or subordinate thesis; a proposition.

Thesis

A position or proposition which a person advances and offers to maintain, or which is actually maintained by argument.

Thesmothete

A lawgiver; a legislator; one of the six junior archons at Athens.

Thespian

Of or pertaining to Thespis; hence, relating to the drama; dramatic; as, the Thespian art. An actor.

Thessalian

Of or pertaining to Thessaly in Greece. A native or inhabitant of Thessaly.

Thessalonian

Of or pertaining to Thessalonica, a city of Macedonia. A native or inhabitant of Thessalonica.

Theta

A letter of the Greek alphabet corresponding to th in English; -- sometimes called the unlucky letter, from being used by the judges on their ballots in passing condemnation on a prisoner, it being the first letter of the Greek qa`natos, death.

Thetical

Laid down; absolute or positive, as a law.

Thetine

Any one of a series of complex basic sulphur compounds analogous to the sulphines.

Theurgist

One who pretends to, or is addicted to, theurgy.

Theurgy

A divine work; a miracle; hence, magic; sorcery.

Thew

Manner; custom; habit; form of behavior; qualities of mind; disposition; specifically, good qualities; virtues.

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