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pericycle
periderm
peridium
peridot
peridotite
perigee
Périgueux
perigynous
perihelion
perikaryon
peril
peril point
perilla
perilous
perilune
perilymph
perimeter
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periodontics
per·i·o·don·tics [ pèrree ə dóntiks ] or per·i·o·don·tia [ pèrree ə dónshə ] or per·i·o·don·tol·o·gy [ pèrree ə don tólləjee ]


noun 
Definition:
 
dental treatment of gums: the branch of dentistry concerned with the treatment of diseases of the gums and other periodontal tissues ( takes a singular verb )


per·i·o·don·tic adjective
per·i·o·don·ti·cal adjective
per·i·o·don·ti·cal·ly adverb
per·i·o·don·tist noun
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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