It was dog-sized and had four toes on the front feet and three on the back feet.
2. A saddle-shaped cavity to contain the winter eggs, situated on the back of Cladocera.
2. A genus of small fish having a head shaped somewhat like that of a horse; the sea-horse.
3. An area buried deep in the forebrain that helps regulate emotion and memory.
Functionally, the hippocampus is part of the olfactory cortex, that part of the cerebral cortex essential to the sense of smell. Certain antidepressants (such as fluoxetine, or Prozac) influence the birth of new neurons in the hippocampus.
The hippocampus is so-called because its shape suggests that of a seahorse. From the Greek hippos, "horse" plus kampos, "a sea monster".
2. A skillful horseman or horsewoman.
3. In rocketry, a U.S. upper stage, with a restartable liquid-propellant engine, used with an Atlas or Titan booster to launch satellites and probes.