anisocoria

from The Collaborative International Dictionary of English v.0.48

anisocoria \an`i*so*co"ri*a\
   ([a^]n`[-i]*s[-o]*k[=o]"r[i^]*[.a]), n. [NL., fr. Gr.
   'a`nisos unequal ('an priv. + 'i`sos equal) + ko`rh pupil.]
   (Med.)
   Inequality of the pupils of the eyes.
   [Webster 1913 Suppl. + AS] anisodactyla