| 单词 | nebula |
| 释义 | nebula (once / 1973 pages) n A nebula is a massive cloud of gas and dust in outer space. A nebula is sometimes the birthplace of stars, such as the Orion Nebula where new stars — a youthful million years old — are still forming. Another example of a nebula is the Crab Nebula — the glowing result of a supernova, noted by Chinese astronomers in 1054 CE. It spans about 10 light-years in length. In biology, a nebula may be a cloudy formation in the eye, or a cloudiness of urine. It also refers to a medicinal preparation put in a nebulizer. When you are talking about more than one nebula (which is probably not that often for the average person), say nebulae. WORD FAMILYnebula: nebulae, nebular, nebulas, nebulous+/nebulous: nebulously USAGE EXAMPLESEdwin Hubble leveraged Leavitt’s law on the behavior of variable stars to gauge distances to certain nebulae. New York Times(Dec 26, 2016) The movie is an adaptation of "Story of Your Life," the Nebula Award-winning novella by author Ted Chiang. Los Angeles Times(Dec 12, 2016) Night fell and pointillist nebulae of moths—thousands of them—appeared in the red, yellow, and blue stage lights above the performers. The New Yorker(Sep 03, 2016) 1n an immense cloud of gas (mainly hydrogen) and dust in interstellar space Hypo|Hyper diffuse nebula, gaseous nebula a cluster of stars within an intricate cloud of gas and dust planetary nebulaa nebula that was once thought to be a star with its planets but is now thought to be a very hot star surrounded by an expanding envelope of ionized gases that emit a fluorescent glow because of intense radiation from the star Hunter, Oriona constellation on the equator to the east of Taurus; contains Betelgeuse and Rigel cloud any collection of particles (e.g., smoke or dust) or gases that is visible 2n (pathology) a faint cloudy spot on the cornea Hyper dapple, fleck, maculation, patch, speckle, spot a small contrasting part of something 3n a medicinal liquid preparation intended for use in an atomizer Hyper formulation, preparation a substance prepared according to a formula 4n cloudiness of the urine Hyper symptom (medicine) any sensation or change in bodily function that is experienced by a patient and is associated with a particular disease |
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