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| ductless glands above the kidneys, consisting of a cortex producing steroidal hormones, and a medulla producing epinephrine and norepinephrine |
| a pair of the largest nerves in the body that originate in the lower back and extend down to above the knees, where they divide into other nerves |
| hippocampus (ˌhɪpəʊˈkæmpəs) | |
| —n , pl -pi | |
| 1. | a mythological sea creature with the forelegs of a horse and the tail of a fish |
| 2. | See sea horse any marine teleost fish of the genus Hippocampus, having a horselike head |
| 3. | an area of cerebral cortex that forms a ridge in the floor of the lateral ventricle of the brain, which in cross section has the shape of a sea horse. It functions as part of the limbic system |
| [C16: from Latin, from Greek hippos horse + kampos a sea monster] | |
| hippo'campal | |
| —adj | |