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pteridosperm
pterodactyl
pteropod
pterosaur
-pterous
pteroylglutamic acid
pterygium
pterygoid process
pteryla
PTFE
ptg.
PTH
PTN
PTO
Ptolemaeus
Ptolemaic
Ptolemaic system
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pteryla
pter·y·la [ térrələ ] (plural pter·y·lae [ térrə l, térrə l ])


noun 
Definition:
 
area where feathers grow: a defined area on the skin of a bird from which feathers grow
[Mid-19th century. < modern Latin< Greek pteron "feather" + hulē "forest"]
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