PellucidarThe fictional Hollow Earth universe created by Edgar Rice Burroughs.
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An imaginary land located underneath the Earth's crust."In Pellucidar, time stands still and everything is in a state of perpetual twilight."
prehistoricRelating to the period before written records.
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of, relating to, or denoting the period before written records."Pellucidar is populated by prehistoric creatures."
iron moleA massive drilling machine featured in 'Pellucidar'.
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A huge machine used for drilling holes through the Earth's crust."The main characters arrived at Pellucidar using an 'iron mole'."
cavernA cave, specifically a large one, commonly found in Pellucidar.
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A large cave or a chamber in a cave."In Pellucidar, there are many caverns filled with precious gems."
telepathyThe supposed communication of thoughts or ideas by means other than the known senses.
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Communication from one mind to another without using physical senses."Many inhabitants of Pellucidar use telepathy to communicate."