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Definitions of spontaneous
  1. adjective
    happening or arising without apparent external cause
    "spontaneous laughter" "spontaneous combustion" "a spontaneous abortion"
    Opposite:
  2. adjective
    said or done without having been planned or written in advance
Definition that contains spontaneous
  • intuitive spontaneously derived from or prompted by a natural tendency
  • autotomy spontaneous removal or casting off of a body part (as the tail of a lizard or claw of a lobster) especially when the organism is injured or under attack
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