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sagitta

n. 天箭座

天箭座

WordNet (r) 3.0 (2006) (WordNet)

Sagitta
n 1: a small constellation in the northern hemisphere between
Cygnus and Aquila and crossed by the Milky Way
2: any arrowworm of the genus Sagitta

The Collaborative International Dictionary of English v.0.48 (gcide)

Sagitta \Sa*git"ta\, n. [L., an arrow.]
1. (Astron.) A small constellation north of Aquila; the
Arrow.
[1913 Webster]

2. (Arch.) The keystone of an arch. [R.] --Gwilt.
[1913 Webster]

3. (Geom.) The distance from a point in a curve to the chord;
also, the versed sine of an arc; -- so called from its
resemblance to an arrow resting on the bow and string.
[Obs.]
[1913 Webster]

4. (Anat.) The larger of the two otoliths, or ear bones,
found in most fishes.
[1913 Webster]

5. (Zool.) A genus of transparent, free-swimming marine worms
having lateral and caudal fins, and capable of swimming
rapidly. It is the type of the class Chaetognatha.
[1913 Webster]

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英文字典中文字典相关资料:

Sagitta - Wikipedia
Sagitta is a dim but distinctive constellation in the northern sky Its name is Latin for 'arrow', not to be confused with the significantly larger constellation Sagittarius 'the archer'
Sagitta Constellation – Constellation Guide
Sagitta (the Arrow) is a small but distinctive constellation in the northern sky It contains the globular cluster Messier 71 and the Necklace Nebula
Sagitta - Enterprise-Class Agency Management for Insurance Business
Sagitta, an enterprise-class agency management solution for Insurance Business It supports complex and specialty lines of business, capabilities to advance accounting finance and secure data
Sagitta (geometry) - Wikipedia
It is used extensively in architecture when calculating the arc necessary to span a certain height and distance and also in optics where it is used to find the depth of a spherical mirror or lens The name comes directly from Latin sagitta, meaning an "arrow"
Sagitta the Arrow lies inside the Summer Triangle - EarthSky
Even though the constellation of Sagitta the Arrow has been around since the 2nd century, it contains dim stars and is the third smallest of the 88 constellations Sagitta the Arrow is
Sagitta | Stars, Milky Way, Summer Triangle | Britannica
Sagitta, constellation in the northern sky at about 20 hours right ascension and 20° north in declination Its brightest star is Gamma Sagittae, with a magnitude of 3 5
Sagitta - noirlab. edu
Photo of the constellation Sagitta produced by NOIRLab in collaboration with Eckhard Slawik, a German astrophotographer The annotations are from a standardized set of 88 western IAU constellations and stick figures from Sky Telescope Please find here a non-annotated version of the image
Sagitta Constellation - Key Facts, Star Map, Mythology
Sagitta (“arrow”) is one of the original 48 constellations mentioned by Greek astronomer Ptolemy in his 2nd century treatise known as the Almagest It is the night sky’s third smallest constellation, taking up an area of just 80 square degrees of the night sky, with its brightest star, the red giant Gamma Sagittae, shining with an

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