punctum

from WordNet (r) 3.0 (2006)

punctum
    n 1: (anatomy) a point or small area

from The Collaborative International Dictionary of English v.0.48

Punctum \Punc"tum\, n. [L., a point.]
   A point.
   [1913 Webster]

   {Punctum c[ae]cum}. [L., blind point.] (Anat.) Same as {Blind
      spot}, under {Blind}.

   {Punctum proximum}, near point. See under {Point}.

   {Punctum remotum}, far point. See under {Point}.

   {Punctum vegetationis} [L., point of vegetation] (Bot.), the
      terminal cell of a stem, or of a leaf bud, from which new
      growth originates.
      [1913 Webster]