English dictionary · noun
photometry
The measurement of various aspects of light, especially its intensity.
Meaning and definitions
- The measurement of various aspects of light, especially its intensity.
- The measurement of the intensity and spectrum of light from stars.
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- photography
The art and technology of producing images on photosensitive surfaces, and its digital counterpart.
- photograph
a picture made using a camera
- diameter
a straight line passing through the center of a circle
- geometry
the branch of mathematics concerned with points, lines, surfaces, and solids
- photographic
Pertaining to photographs or photography.
- perimeter
The sum of the distance of all the lengths of the sides of an object.
- symmetry
Exact correspondence on either side of a dividing line, plane, center or axis.
- photon
The quantum of light and other electromagnetic energy, regarded as a discrete particle having zero rest mass, no electric charge, and an indefinitely long lifetime. It is a gauge boson.
- thermometer
an instrument for measuring temperature
- barometer
An instrument for measuring atmospheric pressure.
- photosynthesis
the process by which plants use sunlight to synthesize food
- telemetry
the automatic measurement and transmission of data from remote sources
- trigonometry
The branch of mathematics that deals with the relationships between the sides and angles of (in particular) right-angled triangles, as represented by the trigonometric functions, and with calculations based on said relationships.
- optometry
The art and science of vision and eye care.
- speedometer
An instrument located within the dashboard of a vehicle that measures and indicates the current speed of the vehicle.
- altimeter
An apparatus for measuring altitude.
- odometer
An instrument, usually embedded within the speedometer of a vehicle, that measures the distance the vehicle has traveled since production.
- micrometer
A device used to measure distance very precisely but within a limited range, especially depth, thickness, and diameter.
- chronometer
A device for measuring time, particularly a precision mechanism for measuring time of day.
- pedometer
A device, often electronic, that measures the number of steps taken, and thus estimates the distance walked.
- stoichiometry
The study and calculation of quantitative (measurable) relationships of the reactants and products in chemical reactions (chemical equations).
- calorimetry
The science of measuring the heat absorbed or evolved during the course of a chemical reaction or change of state.
- calorimeter
An apparatus for measuring the heat generated or absorbed by either a chemical reaction, change of phase or some other physical change.
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Source: Wiktionary entry and revision history. Dictionary text is adapted from Wiktionary under CC BY-SA 4.0. Definitions are selected and reformatted; root links are curated by Word Radicals. Read about sources and limitations.