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undulation
From Wiktionary, the free dictionary
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English
Etymology
From undulate + -ion, or borrowed from Medieval Latin undulātiō; compare French ondulation.
Pronunciation
Audio (Southern England): (file) - Rhymes: -eɪʃən
Noun
undulation (countable and uncountable, plural undulations)
- An instance or act of undulating.
- 1929, Robert Dean Frisbee, The Book of Puka-Puka, Eland, published 2019, page 77:
- But the next undulation would raise us, showing the island ablaze in the sunlight, an emerald of dazzling beauty resting lightly on the bosom of the sea.
- A wavy appearance or outline; waviness.
- (music) A tremulous tone produced by a peculiar pressure of the finger on a string.
- A wavelike curve; a smooth and regular rise and fall.
- A wavelike motion of the air; electromagnetic radiation.
- (medicine, dated) A feeling as if of an undulatory motion about the heart.
- (medicine, dated) The distinctive motion of the matter within an abscess on being pressed when it is ripe for opening.
Derived terms
Translations
instance or act
a tremulous tone produced by a peculiar pressure of the finger on a string
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appearance or outline
a wavelike curve; a smooth and regular rise and fall
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References
- “undulation”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.
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