different between coiling vs undulation

English

Pronunciation

• IPA^(key): /?k??l??/

Verb

coiling

1. present participle of coil

Noun

coiling (plural coilings)

1. The pattern or motion of something that coils.
   • 1854, Herman Melville, The Encantadas

     Holding out her small olive hand before her captain, she said in mild and slowest Spanish, "Senor, I buried him;" then paused, struggled as against the writhed coilings of a snake, and cringing suddenly, leaped up, repeating in impassioned pain, "I buried him, my life, my soul!"

2. The process of fitting a ship with electromagnetic coils, so that it can be degaussed while travelling.

English

Etymology

undulate +? -ion, or borrowed from Medieval Latin undul?ti?; compare French ondulation.

Pronunciation

• Rhymes: -e???n

Noun

undulation (countable and uncountable, plural undulations)

1. An instance or act of undulating.
   • 1929, Robert Dean Frisbee, The Book of Puka-Puka (republished by Eland, 2019; p. 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.

2. A wavy appearance or outline; waviness.
3. (music) A tremulous tone produced by a peculiar pressure of the finger on a string.
4. A wavelike curve; a smooth and regular rise and fall.
5. A wavelike motion of the air; electromagnetic radiation.
6. (medicine, dated) A feeling as if of an undulatory motion about the heart.
7. (medicine, dated) The distinctive motion of the matter within an abscess on being pressed when it is ripe for opening.

Derived terms

• undulationist

Translations

References

• undulation in Webster’s Revised Unabridged Dictionary, G. & C. Merriam, 1913.