The Collaborative International Dictionary of English v.0.48:

Sequela \Se*que"la\, n.; pl. Sequelae. [L., a follower, a
   result, from sequit to follow.]
   One who, or that which, follows. Specifically:
   (a) An adherent, or a band or sect of adherents. "Coleridge
       and his sequela." --G. P. Marsh.
   (b) That which follows as the logical result of reasoning;
       inference; conclusion; suggestion.
       [1913 Webster]

             Sequelae, or thoughts suggested by the preceding
             aphorisms.                           --Coleridge.
       [1913 Webster]
   (c) (Med.) A morbid phenomenon left as the result of a
       disease; a disease resulting from another.
       [1913 Webster]

WordNet (r) 3.0 (2006):

sequela
    n 1: any abnormality following or resulting from a disease or
         injury or treatment; "paralysis is one of the sequelae of
         poliomyelitis"