Таджикистан – Энциклопедия на таджикском языке КИТОБАМ

Periastr (az peri… va yun. astron — sitora), nuqtai ba sitora nazdiktarini madori sitorai digar, ki girdi sitorai yakum harakat mekunad. Dar mavridi nochiz budani ta­siri digar jismhoi osmoni in hara­kat az rui qonuhoi Kepler muayyan meshavad. Mavqei Periastr dar fazo bo ta­siri jalayone tagyir meyobad, ki ba tufayli jozibai …

Peroksidho p a y v a s t h o i peroksidi, payvasthoe, ki atomhoi oksigeni bevosita ba hamdigar payvastshuda dorand. Peroksid du khel meshavand: organiki va gayriorganiki. Peroksidi organi ki dar tarkibashon guruhi—O—O -dorand, ki bo yak yo du atomi karbon payvast shudaand, masalan, Periksidi alkili yo arili (R—O— …

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 …