nubecula

from The Collaborative International Dictionary of English v.0.48

Nubecula \Nu*bec"u*la\, n.; pl. {Nubeculae} (-l[=e]). [L., dim.
   of nubes cloud.]
   1. (Astron.)
      (a) A nebula.
      (b) pl. Specifically, the Magellanic clouds.
          [1913 Webster]

   2. (Med.)
      (a) A slight spot on the cornea.
      (b) A cloudy object or appearance in urine. --Dunglison.
          [1913 Webster]