1. An exceedingly minute body that, according to the views of
development held by some medical scientists of the 16th and 17th
centuries, was contained in a sperm or an oocyte. From this
preformed but infinitely small structure, the human body was
thought to be developed. 2. The distorted figure of a human
superimposed on an illustration of the surface of the brain;
used to demonstrate those portions of the body supplied by the
various motor and sensory cortical regions.