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periodic system
periodic table
periodical
periodical cicada
periodicity
periodization
periodontal
periodontics
perionychium
periosteum
periostitis
periostracum
periotic
Peripatetic
peripatetic
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peripheral
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perionychium

per·i·o·ny·chi·um [ pèrree ō níkee əm ] (plural per·i·o·ny·chi·a [ pèrree ō níkee ə ])


noun 
Definition:
 
skin around nail: the areas of skin that surround a fingernail or toenail

[Early 20th century. < modern Latin< Greek peri "around" < onukh- "nail"]
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