Meaning: A place or situation where new ideas or products are tested.

Part of speech: noun

Example: The city became a testing ground for new technologies.

Category: Science

Synonyms:

• trial area
• experimental site

Meaning: A chemical element with the symbol Tl, used in electronics and medicine.

Part of speech: noun

Example: Thalium is used in some medical imaging techniques.

Category: Science › Chemistry

Synonyms: Tl

Meaning: The layer of Earth's atmosphere above the mesosphere.

Part of speech: noun

Example: The thermosphere is where the auroras occur.

Category: Science › Atmosphere

Synonyms: upper atmosphere

Meaning: The lowest layer of Earth's atmosphere, where weather occurs.

Part of speech: noun

Example: The troposphere extends from the Earth's surface to about 8-15 kilometers high.

Category: Science › Atmospheric Science

Synonyms: lower atmosphere

Meaning: An instrument for measuring angles in horizontal and vertical planes.

Part of speech: noun

Example: Surveyors use a theodolite to measure land.

Category: Science › Geodesy

Synonyms: angle-measuring instrument

Meaning: A statement that has been proven on the basis of previously established statements.

Part of speech: noun

Example: The Pythagorean theorem is fundamental in geometry.

Category: Science › Mathematics

Synonyms: proposition

Meaning: Based on theory rather than practical application.

Part of speech: adjective

Example: Theoretical physics explores concepts that may not be observable.

Category: Science › Physics

Synonyms: abstract

Antonyms: practical

Meaning: A person who forms theories or hypotheses.

Part of speech: noun

Example: The theorist proposed a new model of the universe.

Category: Science › Philosophy

Synonyms: theorizer

Meaning: To form a theory or set of theories about something.

Part of speech: verb

Example: Scientists theorize about the origins of the universe.

Category: Science › Philosophy

Synonyms: hypothesize

Meaning: A system of ideas intended to explain something.

Part of speech: noun

Example: The theory of evolution explains the diversity of life.

Category: Science › Philosophy

Synonyms:

• hypothesis
• concept

Antonyms: fact

Meaning: A unit of heat energy equal to 100,000 British thermal units.

Part of speech: noun

Example: The heating system uses several therms of energy.

Category: Science › Physics

Synonyms: unit of heat

Meaning: Relating to heat.

Part of speech: adjective

Example: Thermal insulation keeps the house warm.

Category: Science › Physics

Synonyms: heat-related

Meaning: The technique of using thermal cameras to detect heat patterns.

Part of speech: noun

Example: Thermal imaging is used in building inspections.

Category: Science › Technology

Synonyms: infrared imaging

Meaning: An instrument for measuring temperature.

Part of speech: noun

Example: Use a thermometer to check the water temperature.

Category: Science › Measurement

Synonyms: temperature gauge

Meaning: A type of plastic that becomes moldable when heated.

Part of speech: noun

Example: Thermoplastic materials are used in many products.

Category: Science › Materials

Synonyms: heat-moldable plastic

Meaning: A prefix relating to heat.

Part of speech: prefix

Example: Thermosetting plastics are heat-resistant.

Category: Science › Prefixes

Meaning: A brand name for a vacuum flask that keeps liquids hot or cold.

Part of speech: noun

Example: I packed my soup in a Thermos for lunch.

Category: Science › Containers

Synonyms: vacuum flask

Meaning: The study of heat and its relation to energy and work.

Part of speech: noun

Example: Thermodynamics is a key concept in physics.

Category: Science › Physics

Synonyms: heat dynamics

Meaning: Relating to nuclear reactions that occur at high temperatures.

Part of speech: adjective

Example: Thermonuclear reactions power the sun.

Category: Science › Physics

Synonyms: nuclear thermal

Meaning: A device that automatically regulates temperature.

Part of speech: noun

Example: The thermostat keeps the room at a comfortable temperature.

Category: Science › Devices

Synonyms: temperature controller

Meaning: The eighth letter of the Greek alphabet, often used in mathematics and science.

Part of speech: noun

Example: Theta is used to represent angles in trigonometry.

Category: Science › Mathematics

Synonyms: Greek letter

Meaning: a radioactive chemical element used in nuclear reactors

Part of speech: noun

Example: Thorium is considered for future energy sources.

Category: Science › Chemistry

Synonyms: Th

Meaning: A chemical element with the symbol 'Tm' and atomic number 69.

Part of speech: noun

Example: Thulium is used in certain types of lasers.

Category: Science › Chemistry

Meaning: A measured period during which events occur.

Part of speech: noun

Example: I need more time to finish my homework.

Synonyms:

• duration
• period

Antonyms: eternity

Meaning: A delay between two events.

Part of speech: noun

Example: There is a time lag between the signal and the response.

Category: Science › Physics

Synonyms:

• delay
• interval

Meaning: A fictional device that allows travel through time.

Part of speech: noun

Example: In the movie, the scientist built a time machine.

Category: Science › Fiction

Synonyms: time travel device

Meaning: The duration between two points in time.

Part of speech: noun

Example: The time span of the project was six months.

Category: Science › Measurement

Synonyms:

• duration
• period

Meaning: A hypothetical situation where time is distorted.

Part of speech: noun

Example: The movie featured a time warp that sent characters to the past.

Category: Science › Fiction

Synonyms: time distortion

Meaning: A region of the Earth that has the same standard time.

Part of speech: noun

Example: New York is in the Eastern time zone.

Category: Science › Geography

Synonyms: timezone

Meaning: A person or device that measures time.

Part of speech: noun

Example: The time-keeper announced the end of the game.

Category: Science › Measurement

Synonyms: chronometer

Meaning: The act of measuring or recording time.

Part of speech: noun

Example: Accurate time-keeping is essential in sports.

Category: Science › Measurement

Synonyms: time measurement

Meaning: Plural of time; instances or occasions.

Part of speech: noun

Example: There were good times and bad times.

Category: Science › Physics

Synonyms:

• periods
• instances

Meaning: A system for measuring time intervals.

Part of speech: noun

Example: The time-scale of the project was clearly defined.

Category: Science › Measurement

Synonyms:

• time frame
• schedule

Meaning: A type of metal used for various purposes.

Part of speech: noun

Example: The can is made of tin.

Category: Science › Materials

Synonyms: metal

Meaning: A container made of tin, often used for food.

Part of speech: noun

Example: I opened a tin can of soup.

Category: Science › Materials

Synonyms: canned food

Meaning: A thin sheet of tin used for various purposes.

Part of speech: noun

Example: The artist used a tin plate for painting.

Category: Science › Materials

Synonyms: tin sheet

Meaning: A prong or sharp point on a fork or antler.

Part of speech: noun

Example: The tine of the fork was bent.

Category: Science › Biology

Synonyms:

• prong
• point

Meaning: A thin sheet of metal, often used for wrapping food.

Part of speech: noun

Example: She covered the dish with tine foil.

Category: Science › Materials

Synonyms: aluminum foil

Meaning: A junction where one road meets another at a right angle.

Part of speech: noun

Example: Be careful when turning at the T-intersection.

Category: Science › Transportation

Synonyms: T-junction

Meaning: Very small in size.

Part of speech: adjective

Example: The kitten is tiny and adorable.

Category: Science › Biology

Synonyms:

• small
• miniature

Antonyms:

• huge
• enormous