aromatic hydrocarbon: a hydrocarbon that contains one or more benzene rings that are characteristic of the benzene series of organic compounds
hydrocarbon: an organic compound containing only carbon and hydrogen
myelomeningocele: a congenital defect of the central nervous system in which a sac containing part of the spinal cord and its meninges protrude through a gap in the vertebral column; frequently accompanied by hydrocephalus and mental retardation