Crossword clues for helicon
The Collaborative International Dictionary
Helicon \Hel"i*con\ (h[e^]l"[i^]*k[o^]n), prop. n. [L., fr. Gr. "Elikw`n.] A mountain in B[oe]otia, 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.
Douglas Harper's Etymology Dictionary
1520s, from Greek Helikon, mountain in Boeotia, sacred to the Muses, in which arose the fountains of Aganippe and Hippocrene. Literally "the tortuous mountain," from helix (genitive helikos) "spiral" (see helix).
Wiktionary
n. (context music English) A large tuba whose coils fit around the player's shoulders.
WordNet
n. a tuba that coils over the shoulder of the musician [syn: bombardon]
Wikipedia
Helicon is a small lunar impact crater that is located on the north part of the Mare Imbrium. To the northwest is the prominent Sinus Iridum, a mountain-ringed bay on the mare. Just to the east is the slightly smaller crater Le Verrier. Helicon is a nearly circular formation with inner walls that curve down to a relatively flat floor. There is a tiny craterlet located at the midpoint of the interior, and a small craterlet along the southwestern rim. As of the 10th of April 2016, this crater is presided over by owner Grace Frances Fethers of Melbourne, Australia. Her plans for the area have not yet been confirmed, but there have been speculations of a palace and surrounding moat.
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 of low temperature and high magnetic fields. Most electromagnetic waves in a normal conductor are not able to do this, since the high conductivity of metals (due to their free electrons) acts to screen out the electromagnetic field. Indeed, normally an electromagnetic wave would experience a very thin skin depth in a metal: the electric or magnetic fields are quickly reflected upon trying to enter the metal. (Hence the shine of metals.) However, skin depth depends on an inverse proportionality to the square root of angular frequency. Thus a low frequency electromagnetic wave may be able to overcome the skin depth problem, and thereby propagate throughout the material.
A helicon discharge is an excitation of plasma by helicon waves induced through radio frequency heating. The difference between a helicon plasma source and an inductively coupled plasma (ICP) is the presence of a magnetic field directed along the axis of the antenna. The presence of this magnetic field creates a helicon mode of operation with higher ionization efficiency and greater electron density than a typical ICP. The Australian National University, in Canberra, Australia, is currently researching applications for this technology. A commercially developed magnetoplasmadynamic engine called VASIMR also uses helicon discharge for generation of plasma in its engine. Potentially, Helicon Double Layer Thruster plasma based rockets are suitable for interplanetary travel.
Helicon or Helikon may refer to
The helicon is a brass musical instrument in the tuba family. Most are B basses, but they also commonly exist in E, F, and tenor sizes, as well as other types to a lesser extent.
The sousaphone is a specialized version of the helicon. The first sousaphone, a non-production prototype made by J. W. Pepper & Son, Inc., had an upright bell, hence the nickname "rain catcher" because of its shape. Later production versions differ primarily in two ways: a bell shaped to face forward with a larger flare and a bell diameter of 22 to 28 inches, and a "goose-neck" leadpipe which offers greater adjustability of mouthpiece position at the expense of tone quality. Both the sousaphone and helicon have circular shapes and are designed to be worn on the shoulder.
The instrument is very popular in Central and Eastern Europe and is a common choice for military fanfares. It is used by Ed Neuhauser of the traditional folk band Bellowhead.
The range of the B Helicon is two octaves below that of a B cornet.
Helicon (also transliterated Helikon) was a river of the Macedonian city Dion.
Helicon was briefly mentioned in some stories of Orpheus. After he was killed by some of Dionysus' followers, the women tried to wash their hands clean of the blood spilt. The river sank itself so as not to become tainted with the murdered man's blood.
Usage examples of "helicon".
The chaste daughters of Apollo willingly left the slopes of Helicon and Parnassus at his call.
Before setting about the task, Bellerophon consulted the seer Polyeidus, and was advised to catch and tame the winged horse Pegasus, beloved by the Muses of Mount Helicon, for whom he had created the well Hippocrene by stamping his moon-shaped hoof.
Citizens of Trantor, even one offworlder, from Helicon, oddly enough, my home world.
He had brought the image with him from Helicon, decades before, yet had only mounted it in this large frame a year ago.
He had been born beneath the wide skies of Helicon, and had at first found these covered environs a little daunting, even depressing, but his long decades on Trantor had gradually inured him.
How nice it would be not to think of death and decay, to be elsewhere, on Helicon perhaps, learning anew how to live without fear beneath the skythe sky!
How she would startle the dull, insipid, tea-table simperers on our Helicon--nay, with what scorn she would traverse the Helicon itself.
One of them, I guess, must be Mount Helicon, home to my Muse and her sisters, if sisters she has.
The artless Helicon I boast is youth-- should either not know, or should seem not to know, so much about his own ancestry.
Merrit was from cold, mountainous Helicon, and he was already sick of the steamy humidity after less than six hours on-planet.
Before me rolled wave after wave of the Parnassian chain, divided by deep lateral valleys, while Helicon, in the distance, gloomed like a thunder-storm under the weight of gathered clouds.
John Hopkins and Robert Wisdom completed the translation of the Psalms, which Fuller in his history says was at first derided and scoffed at as piety rather than poetry, adding that the good gentleman had drunk more of Jordan than of Helicon.
Helicon is a fairly homogeneous world, culturally speaking, and we tend to cling to our private ways firmly because we're overshadowed by our neighbors.
Helicon is a fairly homogeneous world, culturally speaking, and we tend to cling to our private ways firmly because were overshadowed by our neighbours.
For they cannot tell what is the nature of the soul, whether it be born or on the contrary find its way into men at their birth, and whether it perish together with us when severed from us by death or visit the gloom of Orcus and wasteful pools or by divine decree find its way into brutes in our stead, as sang our Ennius who first brought down from delightful Helicon a crown of unfading leaf, destined to bright renown throughout Italian clans of men.