1. Not based on reason or evidence
   "unreasoning panic"
   - blind

See also: irrational

• Ptilonorhynchidae
• Ptilonorhynchus
• Ptilonorhynchus violaceus
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• Ptloris paradisea
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• ptomaine poisoning
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• ptyalism
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• ptyalize
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• Ptyas mucosus