| 单词 |
Draconid |
| 释义 |
Draconid, n. (and a.) Astron.|ˈdreɪkɒnɪd|
[f. L. dracō, dracōn- dragon n.1 + -id2.]
In pl. One of a shower of meteors with a radiant point in the constellation Draco, seen about 7–10 October in some years; usu. in pl.. Also attrib. or as adj.
1926Monthly Notices R. Astron. Soc. LXXXVII. 105 A region lying about 10° or 12° S. of the Draconid radiant. Ibid., It appears that the recent Draconid shower of October 9 was not rich in the early evening... A special feature of these cometary Draconids..is the dense and sometimes durable streaks or trails which the brighter ones leave in their paths. 1938R. H. Baker Astron. (ed. 3) vi. 247 The association of the Draconids with the Giacobini-Zinner comet..is a recent identification. 1954A. C. B. Lovell Meteor Astron. xvi. 326 By far the most spectacular meteor displays of the present century have been given by the Giacobinid, or Draconid, meteor shower. 1979Sci. Amer. Mar. 45/2 The cometary meteors are those seen in the periodic meteor showers, such as the Perseids, which follow the orbit of Comet Swift-Tuttle, and the Draconids, which are associated with the short-period Comet Giacobini-Zinner. |
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单词 draconiform 释义 draconiform, a.|drknfm|[f. L. dracon-, draco dragon: see -form.]Rese......