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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adj
Describes a travelling wave whose amplitude is constricted; e.g. a wave in shallow water.
Definition source: English Wiktionary via Wiktextract
Usage: not-comparable
Topics: mathematics, natural-sciences, physical-sciences, physics, sciences
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
History
Coined by Diederik Korteweg and Gustav de Vries in their paper in Philosophical Magazine (1895, series 5, vol. 39, pp. 422-443) to describe a class of solutions to the KdV equation which involve a Jacobi elliptic function. The Jacobi elliptic function involved is commonly written as cn(x|m), and the term cnoidal was designed to be analogous to sinusoidal, the word describing waves which involve the sine function.
Across languages
3 source translations are retained for this English entry.
