The Collaborative International Dictionary of English v.0.48:

Gutta \Gut"ta\, n.; pl. Guttae. [L.]
   1. A drop.
      [1913 Webster]

   2. (Arch.) One of a series of ornaments, in the form of a
      frustum of a cone, attached to the lower part of the
      triglyphs, and also to the lower faces of the mutules, in
      the Doric order; -- called also campana, and drop.
      [1913 Webster]

   Gutta serena [L., lit. serene or clear drop] (Med.),
      amaurosis.

   Gutt[ae] band (Arch.), the listel or band from which the
      gutt[ae] hang.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

amaurosis \am`au*ro"sis\ ([a^]m`[add]*r[=o]"s[i^]s), n. [Gr.
   'amay`rosis, fr. 'amayro`s dark, dim.] (Med.)
   A loss or decay of sight as the result of a neurological
   disease, without any perceptible changes in the eye; --
   called also gutta serena, the "drop serene" of Milton.
   [1913 Webster + AS]

   Amaurosis fugax (Med.), Temporary amaurosis
      [AS]