
1) Bass horn 2) Bombardon 3) Brass instrument 4) Circular tuba 5) Elevation in Europe 6) Elevation in Greece 7) European mountain 8) European hill 9) European peak 10) European elevation 11) Greek peak 12) Greek elevation 13) Greek hill 14) Greek mountain 15) Hill in Europe 16) Hill in Greece 17) Home of the Muses
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https://www.crosswordclues.com/clue/helicon

1) Bombardon 2) Poetry 3) Tuba
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https://www.crosswordclues.com/clue/helicon
[crater] ==Satellite craters== According to convention these features are identified on lunar maps by placing the letter on the side of the crater midpoint that is closest to Helicon. ...
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http://en.wikipedia.org/wiki/Helicon_(crater)
[instrument] The helicon is a brass musical instrument in the tuba family. Most are B{music|flat} basses, but they also commonly exist in E{music|flat}, F, and tenor sizes, as well as other types to a lesser extent. The sousaphone is a specialized version of the helicon. The original sousaphone produced by J. W. Pepper & Son, Inc. had an up...
Found on
http://en.wikipedia.org/wiki/Helicon_(instrument)
[physics] A helicon is a low frequency electromagnetic wave that can exist in plasmas in the presence of a magnetic field. The first helicons observed were atmospheric whistlers, but they also exist in solid conductors or any other electromagnetic plasma. Helicons have the special ability to propagate through pure metals, given conditions o...
Found on
http://en.wikipedia.org/wiki/Helicon_(physics)

bass tuba
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http://phrontistery.info/h.html

• (n.) A mountain in Boeotia, in Greece, supposed by the Greeks to be the residence of Apollo and the Muses.
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http://thinkexist.com/dictionary/meaning/helicon/

a bass or contrabass tuba built in a spiral circular form and resting on the shoulder. It is believed to have been invented in Russia but was ... [1 related articles]
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http://www.britannica.com/eb/a-z/h/33

Mountain in central Greece, on which was situated a spring and a sanctuary sacred to the
Muses. ...
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http://www.encyclo.co.uk/local/20688
Hel'i·con noun [ Latin , from Greek ....] A mountain in Bœotia, in Greece, supposed by the Greeks to be the residence of Apollo and the Muses. « From
Helicon's harmonious springs A thousand rills their mazy progress take.»
Gray. Found on
http://www.encyclo.co.uk/webster/H/28

Helicon was a mountain in central Greece, on which was situated a spring and a sanctuary sacred to the Muses.
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http://www.probertencyclopaedia.com/browse/D1H.HTM

[
n] - a tuba that coils over the shoulder of the musician
Found on
http://www.webdictionary.co.uk/definition.php?query=helicon

helicon 1. A large spiral brass tuba-musical instrument that fits around the player's shoulder. 2. A tuba that coils over the shoulder of the musician.
Found on
http://www.wordinfo.info/words/index/info/view_unit/962/
noun a tuba that coils over the shoulder of the musician
Found on
https://www.encyclo.co.uk/local/20974

Mountain in central Greece, on which was situated a spring and a sanctuary sacred to the Muses
Found on
https://www.encyclo.co.uk/local/21221
No exact match found.