homunculus

/həˈmʌŋkjələs/
noun
  1. A very small human or human-like creature, especially in myths, stories, or old scientific ideas.
    • In medieval legends, alchemists claimed they could create a homunculus in a flask.
    • The fantasy novel featured a tiny homunculus who served as the wizard's assistant.
    • Some old drawings show a homunculus inside the head to explain how the mind works.
  2. A representation of the human body in which body parts are drawn in proportion to how much brain area controls them, used in neuroscience.
    • Students in biology class studied the sensory homunculus to learn about the brain's map of the body.
    • The cortical homunculus shows a huge hand and lips because those areas have many nerve connections.
    • The motor homunculus illustrates which parts of the brain control different muscles.
Synonyms
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