Dictionary
2 ENTRIES FOUND:

nebula

noun neb·u·la \ˈne-byə-lə\

: a cloud of gas or dust in space that can sometimes be seen at night

: a group of stars that are very far away and look like a bright cloud at night

plural neb·u·lae\-ˌlē, -ˌlī\ also neb·u·las

Full Definition of NEBULA

1
:  any of numerous clouds of gas or dust in interstellar space
2
:  galaxy 1b; especially :  a galaxy other than the Milky Way galaxy —not used technically
neb·u·lar \-lər\ adjective

Origin of NEBULA

New Latin, from Latin, mist, cloud; akin to Old High German nebul fog, Greek nephelē, nephos cloud
First Known Use: 1718

nebula

noun neb·u·la \ˈneb-yə-lə\   (Medical Dictionary)
plural neb·u·las or neb·u·lae \-ˌlē, -ˌlī\

Medical Definition of NEBULA

:  a slight cloudy opacity of the cornea

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