Dactyl and Ida share many characteristics, suggesting a common origin.
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Dactyl is the first satellite of an asteroid to be discovered.
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The fifth is almost always a dactyl, and last must be a spondee.
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The fifth foot is a dactyl, as is nearly always the case.
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These equivalences allow for easy substitutions of one foot by another e.g. a spondee can be substituted for a dactyl.
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Dactyl shares many characteristics with Ida.
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The fifth foot is almost always a dactyl.
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It may be seen as a reversed dactyl.
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The word dactyl comes from the Greek word daktylos meaning finger, since there is one long part followed by two short stretches.
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More examples
A metrical unit with stressed-unstressed-unstressed syllables
Digit: a finger or toe in human beings or corresponding body part in other vertebrates
243 Ida (EYE-da) is an asteroid in the Koronis family of the main belt. It was discovered on 29 September 1884 by Johann Palisa and named after a nymph from Greek mythology. Later telescopic observations categorized Ida as an S-type asteroid, the most numerous type in the inner asteroid belt. ...
In Greek mythology, the Dactyls (pronounced ; from Greek u0394u03ACu03BAu03C4u03C5u03BBu03BFu03B9 "fingers") were the archaic mythical race of male beings associated with the Great Mother, whether as Cybele or Rhea. Their numbers vary, but often they were ten spirit-men so like the three Curetes, the Cabiri or the Korybantes that they were often interchangeable. The Dactyls were both ancient smiths and healing magicians...
A dactyl (Greek: u03B4u03ACu03BAu03C4u03C5u03BBu03BFu03C2, du00E1ktylos, u201Cfingeru201D) is a foot in poetic meter. In quantitative verse, often used in Greek or Latin, a dactyl is a long syllable followed by two short syllables, as determined by syllable weight...
(DACTYLS) were the discoveries of iron and the art of working with it.
(Dactyls) A class of sorcerers and scientific physicians who had their origin in Phrygia. Their number is given differently by different authorities. Some say it equals the number of fingers on the hands-five male and five female. ...
A hollow, nodular to cylindrical protuberance, somewhat resembling a swollen isidium, bounded by a cortex, often opening at the apex to expose the medulla.
A three-syllable foot consisting of a heavy stress and two light stresses. Examples of words in English that naturally constitute dactyls include strawberry, carefully, changeable, merrily, mannequin, tenderly, prominent, buffalo, glycerin, notable, scorpion, tedious, horrible, and parable. ...