different between dune vs undulation

English

Etymology

Partly from a dialectal form of down; and partly from French dune (from Old French dune), or from Middle Dutch d?ne (modern Dutch duin), or from Middle Low German dûne; all ultimately from Proto-Germanic *d?n?, *d?naz, probably from Gaulish dunum (“hill”), from Proto-Celtic *d?nom (“stronghold, rampart”), from Proto-Indo-European *d?uHnom (“enclosure”), from *d?ewh?- (“to finish, come full circle”). Doublet of down (which see).

Pronunciation

• (UK) IPA^(key): /dju?n/, /d?u?n/
  • Homophone: June (with /d?/)
• (US) IPA^(key): /du?n/
• Rhymes: -u?n

Noun

dune (plural dunes)

1. (geomorphology) A ridge or hill of sand piled up by the wind.

Synonyms

• sand dune, sand-dune

Antonyms

• dyke, dike

Derived terms

• dunesand
• duney

Related terms

• duned

Translations

Anagrams

• nude, undé

French

Etymology

From Old French dune, from Middle Dutch d?ne (Dutch duin), possibly from Gaulish *dunon (“hill”).

Pronunciation

• IPA^(key): /dyn/

Noun

dune f (plural dunes)

1. dune

Further reading

• “dune” in Trésor de la langue française informatisé (The Digitized Treasury of the French Language).

Italian

Pronunciation

• Rhymes: -une

Noun

dune f pl

1. plural of duna

Anagrams

• nude

Middle English

Noun

dune

1. Alternative form of dynne

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.