Weather data for Mecca in january: Weather data for Mecca for january are derived from an average of the weather forecast since 2009 in Mecca. There is a margin of error and these forecasts are to be considered as general information only. The weather in Mecca can vary slightly from year to year, but this data should limit surprises.
Freebase(0.00 / 0 votes)Rate this definition: Spinal cord. The spinal cord is a long, thin, tubular bundle of nervous tissue and support cells that extends from the brain. The brain and spinal cord together make up the central nervous system.
home / medterms medical dictionary a-z list / spinal cord definition Medical Definition of Spinal cord Spinal cord: The major column of nerve tissue that is connected to the brain and lies within the vertebral canal and from which the spinal nerves emerge. Thirty-one pairs of spinal nerves originate in the spinal cord: 8 cervical, 12 thoracic, 5 lumbar, 5 sacral, and 1 coccygeal. The spinal cord and the brain constitute the central nervous system. The spinal cord consists of nerve fibers that transmit impulses to and from the brain. Like the brain, the spinal cord is covered by three connective-tissue envelopes called the meninges.