Perimetr (yun. rerimetron — davra, az rerimetrio — atrofro chen mekunam), darozii konturi sarbast. In istilohro beshtar baroi ifodai hosili jami darozii hamai tarafhoi sekunja va bisyorkunja istifoda mebarand.

Periodonit (az peri… va yun. odontos — dandon), gazaki pardai resha va boftahoi atrofi dandon. Asosan badi kariesi dandon paydo me­shavad. Ammo az takroran zarb khurdani dandon (masalan, az rui odat gazidani angusht, qalam, mekh, bo dan­don kandani rishta va gayra) niz ba vujud meoyad. Periodontit shadid va muzmin meshavad. …

Perpendikulyar (lot. perpendiculoris—shoquli), khati rostest, ki khati rosti digari hamvorii malumro tahti kunji rost meburad.

Perro (Rerrault) Sharl (12. 1. 1628, Parij—16. 5. 1703, hamon jo), shoir va munaqqidi fransavi. A­zoi akademiyai Fransiya (az soli 1671). Az oilai amaldor. Avvalho huquqshinos bud. Avvalin asari Perro dosto­ni «Devorhoi Troya yo Paidoishi bur­lesk» (1653) ast. Dostonhoi ramzi, qasidayu nomahoyash dar sabki nazmi purdabdabai darbor talif shuda­and. Perro …

Perseitho, seli meteor (shihob), kya radiantash dar burji Persey voqe ast. Az 25 iyul to 20 avgust mushohida meshavad. Bo kometai 1862 III aloqamand ast. Perseiho avvalin seli meteorhost, ki aloqamandii on bo kometa muayyan shudaast (J. Skiapa­relli, 1866). Perseitho yake az selhoi meteorii faolest, ki vizuali yo bo usuli …

Persey, dar asotiri Yunoni Qadim qakhramon, pisari Danaya va khudo Zevs. Bino ba shahodati asotiri yunoni ba shohi Argos Akrisiy peshgui kardaand, ki u bo dasti naberaash Persey kushta khohad shud. Binobar on Akrisiy amr kardaast, ki Perseyro bo modarash dar sanduq andokhta ba bahr partoyand. Danaya va Perseyro mohigiron …

Persefona, Kora, dar asotiri Yunoni Qadim olihai farovonhosili va olami zerizaminist. Dukhtari Demetra va Zevs. Bayni rimiyon bo nomi Prozerpina malum ast.

Personaj (frans. Rerssonage, az lot. rersona — shakhs, simo), ishtirokchii piesa (spektakl), sena­riya (kinofilm), roman va digar asar­hoi badei.

Personalizm (az lot. rersona— shakhs, simo), jarayoni teistist dar falsafai muosiri burjuazi, ki shakhsiyatro realiyati ejodii ibtidoi va jahonro zuhuroti faoliya­ti ejodii shakhsiyati oli (khudo) medonad. Personalizm okhiri asri 19 dar Rossiya va ShMA, solhoi 30 asri 20 dar Fransiya va mamlakathoi digar tashakkul yoftaast. Personalizm plyuralizmi idealistiro ba prinsipi …

Perspektivi (frans. respective; az lot. rerspicio — purra mebinam), sistemai tasviri jismhoi se­chena dar hamvori yo dar yagon sath ast, ki sokhti fazoi va durii qismhoi judogonai onro az mushohid ba nazar megirad. Qoidahoi Perspektivaro ma­tematiki Yunoni Qadim Uklidus (Evklid) dar «Optika» nom asarash sharh doda shud. Olimonu memoroni italiyavi …