See Also: Nebula(medicine)
nebula(encyclopedia)
nebula(dictionary)
Gum Nebula(encyclopedia)
nebula(dictionary)
Orion Nebula(encyclopedia)
Crab Nebula(encyclopedia)
planetary nebula(encyclopedia)
solar nebula(encyclopedia)
nebula (as used in expressions)(encyclopedia)

nebula (iou)



nebula noun. , -las. M17.
[Latin = mist, vapour.]
a. A film or clouded spot on or over the cornea of the eye. Now only Medicine. M17.
b. Medicine. Cloudiness observed in the urine. rare. M17.
c. A cloud, (a) cloudlike appearance; an indistinct, insubstantial, or nebulous thing or (fig.) person. M18.
Astronomy. A hazy or indistinct luminous area in the night sky representing a distant cluster of stars; (chiefly Hist.) a galaxy. Now usu. spec., a cloud of gas, dust, etc., in deep space, appearing lighter or darker due to the reflection, absorption, etc., of light. E18.
crab nebula, emission nebula, planetary nebula, spiral nebula, etc.
Fog, mist. rare. L19.