1. Of metals e.g.; not made shiny and smooth by friction

See also: unpolished

• pteropogon
• Pteropogon humboltianum
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• pterosaur
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• pteroylmonoglutamic acid
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• pterygoid plexus
• pterygoid process
• pteryla
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• Ptilonorhynchus
• Ptilonorhynchus violaceus
• Ptloris
• Ptloris paradisea