Standard Lemma guide
Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.
Sound
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noun
Any of several instruments used to measure various aspects of the intensity of light.
Definition source: English Wiktionary via Wiktextract
Topics: natural-sciences, physical-sciences, physics
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
verb
To measure some aspect of light (from a star) using a photometer.
Definition source: English Wiktionary via Wiktextract
Topics: astronomy, natural-sciences
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
noun
photographic equipment that measures the intensity of light
Definition source: Princeton WordNet 3.0
No example sentence was provided for this meaning.
Synonyms: light meter, exposure meter
Antonyms: none provided
Broader terms: photographic equipment
Narrower terms: cytophotometer
noun
measuring instrument for measuring the luminous intensity of a source by comparing it (visually or photoelectrically) with a standard source
Definition source: Princeton WordNet 3.0
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
Broader terms: measuring instrument, measuring system, measuring device
Narrower terms: spectrophotometer
History
Etymology tree Proto-Indo-European *bheh2- Proto-Indo-European *bhéh2os Proto-Hellenic *pháwos Ancient Greek φᾰ́ος (phắos) Ancient Greek φῶς (phôs) Ancient Greek φωτο- (phōto-)der. English photo- Proto-Indo-European *meh1- Proto-Indo-European *-tḗr Proto-Indo-European *-trom Proto-Hellenic *-tron Ancient Greek -τρον (-tron) Ancient Greek μέτρον (métron)lbor. French -mètrebor. English -meter English photometer From photo- + -meter.
Across languages
25 source translations are retained for this English entry.
