Eta-aquarids



[ey-tuh, ee-tuh] /ˈeɪ tə, ˈi tə/

noun, (used with a plural verb) Astronomy.
1.
See under .
[ak-wuh-rids, ah-kwuh-] /ˈæk wə rɪds, ˈɑ kwə-/
noun, (used with a plural verb)
1.
either of two collections of meteors comprising meteor showers having their apparent origin in the constellation and visible either in early May (Eta Aquarids) or late July (Delta Aquarids)

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    noun 1. a star and its surrounding nebula in the constellation Carina: the star was brighter than every star except Sirius in the 1840s and now is of seventh magnitude; the nebula is the brightest infrared object in the nighttime sky.

  • Eta-c meson

    [ey-tuh-see, ee-tuh-] /ˈeɪ təˈsi, ˈi tə-/ noun, Physics. 1. a neutral meson having a mass 5832 times that of the electron and a mean lifetime of approximately 3.1 × 10 -22 seconds.



  • Eta conversion

    theory In lambda-calculus, the eta conversion rule states \ x . f x f provided x does not occur as a free variable in f and f is a function. Left to right is eta reduction, right to left is eta abstraction (or eta expansion). This conversion is only valid if bottom and \ x […]

  • Eta-c particle

    [ey-tuh-see, ee-tuh-] /ˈeɪ təˈsi, ˈi tə-/ noun, Physics. 1. a neutral meson having a mass 5832 times that of the electron and a mean lifetime of approximately 3.1 × 10 -22 seconds. eta-c particle (ā’tə-sē’, ē’tə-) An electrically neutral meson having a mass 5,832 times that of the electron and a mean lifetime of approximately […]



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