pH

Science / Chemistry / pH: Ph is a measure of effective concentration of hydrogen ions in a solution. It is approximately related to the molarity of H+ by ph = - log [H+]
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Photon

Science / Chemistry / Photon: A discrete packet of energy associated with electromagnetic radiation. Each photon carries energy E proportional to the frequency nu of the radiation: E = hnu, where h is Planck's constant. MORE

Ideograph

Entertainment / Literature / Ideograph: Also called a logograph or ideogram, this is a written symbol system in which a single marking or collection of markings represents not a phonetic sound but rather an entire word or idea. Classical Eg MORE

Euphemism

Entertainment / Literature / Euphemism: Using a mild or gentle phrase instead of a blunt, embarrassing, or painful one. For instance, saying 'Grandfather has gone to a better place' is a euphemism for 'Grandfather has died.' The idea is to MORE

Ecphrasis

Entertainment / Literature / Ecphrasis: (plural, ecphrases) A passage of literature or poetry in which the writer disrupts the narrative and writes a lengthy passage describing, representing, or 'translating' another type of art such as a p MORE

Phonetics

Entertainment / Literature / Phonetics: The study of phonemes, or units of sound in spoken language. MORE

Phonogram

Entertainment / Literature / Phonogram: A written symbol that indicates a spoken sound. Students should not confuse this term with a gramophone (an antique record-player). MORE