Quick definitions from WordNet (Horner's syndrome)
▸ noun: a pattern of symptoms occurring as a result of damage to nerves in the cervical region of the spine (drooping eyelids and constricted pupils and absence of facial sweating)
▸ noun: a pattern of symptoms occurring as a result of damage to nerves in the cervical region of the spine (drooping eyelids and constricted pupils and absence of facial sweating)