"lizard brain" meaning in English

{
  "forms": [
    {
      "form": "lizard brains",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "lizard brain (plural lizard brains)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Anatomy",
          "orig": "en:Anatomy",
          "parents": [
            "Biology",
            "Medicine",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Psychology",
          "orig": "en:Psychology",
          "parents": [
            "Social sciences",
            "Sciences",
            "Society",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "_dis": "53 47",
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "The most primitive part of the brain; the brain stem."
      ],
      "id": "en-lizard_brain-en-noun-YAbMiMov",
      "links": [
        [
          "anatomy",
          "anatomy"
        ],
        [
          "psychology",
          "psychology"
        ],
        [
          "primitive",
          "primitive"
        ],
        [
          "brain",
          "brain"
        ],
        [
          "brain stem",
          "brain stem"
        ]
      ],
      "raw_glosses": [
        "(anatomy, psychology) The most primitive part of the brain; the brain stem."
      ],
      "related": [
        {
          "_dis1": "77 23",
          "word": "lizard-brained"
        }
      ],
      "topics": [
        "anatomy",
        "human-sciences",
        "medicine",
        "psychology",
        "sciences"
      ]
    },
    {
      "categories": [
        {
          "_dis": "53 47",
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        }
      ],
      "examples": [
        {
          "ref": "2017 November, N. K. Jemisin, Mac Walters, chapter 8, in Mass Effect Andromeda: Initiation, 1st edition (Science Fiction), Titan Books, →OCLC, page 155",
          "text": "With her pistol drawn, she hurried down the ramp and into cover behind one of the landing pad’s walls, listening carefully. The hangar was as silent as—well, as a tomb. The temptation to take off her helmet was powerful, to rely on scents and sounds and instincts instead of equipment and sensors. Everything about this mess had her lizard-brain in overdrive. SAM-E’s warning about a hostile intent in the system, controlling life support and even the hangar bay doors, kept her from obeying that instinct.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Any part of a person's psyche or personality dominated by instinct or impulse rather than rational thought."
      ],
      "id": "en-lizard_brain-en-noun-axbptLiI",
      "raw_glosses": [
        "(by extension) Any part of a person's psyche or personality dominated by instinct or impulse rather than rational thought."
      ],
      "synonyms": [
        {
          "word": "id"
        },
        {
          "word": "reptilian brain"
        }
      ],
      "tags": [
        "broadly"
      ]
    }
  ],
  "word": "lizard brain"
}

{
  "categories": [
    "English countable nouns",
    "English entries with incorrect language header",
    "English lemmas",
    "English multiword terms",
    "English nouns"
  ],
  "forms": [
    {
      "form": "lizard brains",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "lizard brain (plural lizard brains)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "lizard-brained"
    }
  ],
  "senses": [
    {
      "categories": [
        "en:Anatomy",
        "en:Psychology"
      ],
      "glosses": [
        "The most primitive part of the brain; the brain stem."
      ],
      "links": [
        [
          "anatomy",
          "anatomy"
        ],
        [
          "psychology",
          "psychology"
        ],
        [
          "primitive",
          "primitive"
        ],
        [
          "brain",
          "brain"
        ],
        [
          "brain stem",
          "brain stem"
        ]
      ],
      "raw_glosses": [
        "(anatomy, psychology) The most primitive part of the brain; the brain stem."
      ],
      "topics": [
        "anatomy",
        "human-sciences",
        "medicine",
        "psychology",
        "sciences"
      ]
    },
    {
      "categories": [
        "English terms with quotations"
      ],
      "examples": [
        {
          "ref": "2017 November, N. K. Jemisin, Mac Walters, chapter 8, in Mass Effect Andromeda: Initiation, 1st edition (Science Fiction), Titan Books, →OCLC, page 155",
          "text": "With her pistol drawn, she hurried down the ramp and into cover behind one of the landing pad’s walls, listening carefully. The hangar was as silent as—well, as a tomb. The temptation to take off her helmet was powerful, to rely on scents and sounds and instincts instead of equipment and sensors. Everything about this mess had her lizard-brain in overdrive. SAM-E’s warning about a hostile intent in the system, controlling life support and even the hangar bay doors, kept her from obeying that instinct.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Any part of a person's psyche or personality dominated by instinct or impulse rather than rational thought."
      ],
      "raw_glosses": [
        "(by extension) Any part of a person's psyche or personality dominated by instinct or impulse rather than rational thought."
      ],
      "synonyms": [
        {
          "word": "id"
        },
        {
          "word": "reptilian brain"
        }
      ],
      "tags": [
        "broadly"
      ]
    }
  ],
  "word": "lizard brain"
}