noun (plural nebulae /-liː/ or nebulas)
- 1 Astronomy A cloud of gas and dust in outer space, visible in the night sky either as an indistinct bright patch or as a dark silhouette against other luminous matter.More example sentences
- Evolutionists believe that the solar system condensed out of a cloud of gas and dust called a nebula, hence the nebular hypothesis.
- We have missions that include active nebulas, swirling dust clouds, moving asteroids and asteroid fields.
- A planetary nebula forms when Sun-like stars gently eject their outer gaseous layers to form bright nebulae with amazing twisted shapes.
- 1.1 • dated A galaxy.More example sentences
- Then Edward Hubble discovered that the nebulae were other galaxies like ours only much further away than was thought possible.
- In further studies, he showed that these nebulas are actually other galaxies, and he went on to classify them.
- Hubble realized that these spiral nebulae were so far away they were actually galaxies - separate cities of stars - far beyond our own Milky Way.
- 2 Medicine A clouded spot on the cornea causing defective vision.More example sentences
- The bruise over his eye had settled in to a purple nearly matching the nebula itself, but the swelling had reduced dramatically.
- It treats conjunctivitis, pterygium, nebula and pain in the eyes.
mid 17th century (as a medical term): from Latin, literally 'mist'.
More definitions of nebulaDefinition of nebula in:
- The US English dictionary