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peripheral nervous system
periphery
periphery region
periphrasis
periphrastic
periphyton
periplasm
periplast
periproct
peripteral
perique
periscope
periscopic
perish
perishable
perished
perisher
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periproct
per·i·proct [ pérrə pròkt ] (plural per·i·procts)


noun 
Definition:
 
area near anus of invertebrate: the area surrounding the anus of some invertebrate animals such as sea urchins
[Late 19th century. <peri- + Greek prōktos "anus"]
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