Oktant (lotini octane — hashtyaki davra), oktan, asbobi zoviyasanj buda, qismi asosii onro kamone tashkil medihad, ki ba hashtyaki davra barobar ast va on ba darajavu hissahoi daraja taqsim karda shudaast. Odatan, asbobhoero Oktant menomand, ki az rui sokhtashon ba sek­stant monandand. Hozir Oktanthoro kam istifoda mebarand.

Okrugi avtonomii Evenkho, Evenkiya, dar hayati kishvari Kras­noyarski RSFSR. 10 dekabri 1930 (to 1977 Okrugi millii Evenk) tashkil shu- daast. Masohat 767,6 hazor kilometr2. Aholiash 16 hazor nafar (1979). Ba 3 rayoni mamuri va 1 posyolkai tipi shahr taqsim shudaast. Markazash posyolkai Tura. Tabiat. Okrugi avtonomii Evenkho dar qismi marka­zii …

Oktaedr (lotini oklaedron, az okto — hasht va hedre ruya), yake az panj bisyorruyai muntazam, ki 8 ruya (sekunda), 12 tega, 6 qulla (dar qar yak qulla 4 tega hamdoya meshavand) dorad. Agar a darozii tega boshad, hajmi Oktant chunin ast: V – Hill 0.4714 a3.

Okrugi avtonomi, d a r S S S R yake az shaklhoi amaligardonii av- tonomiyai mamuri meboshad. To qabuli Kosnstitutsiyai SSSR (1977) Okrugi avtonomiro okrugi milli menomidand. Okrugi avtonomi dar hududi hayati aholiash yakkhela tashkil yofta, bo khususiyathoi tarkibi milli va tarzi zindagonii aholi farq mekunad va ba hayati kishvar …

«Oktyabri surkh», gazeta, organi komiteti rayonii PK Tojikiston va Sove­ti deputathoi mehnatkashoni payoni Oktyabr (hozira payoni Vakhsh). Az soli 1938 to 1959 bo tiraji 3500 nuskha haftae 3 marotiba ba zabonhoi tojiki va uzbeki nashr meshud.

Okrugi intikhoboti, vohidi territoriyavii intikhoboti baroi gu- zaronidani intikhobotest, ki organhoi namoyandagii davlati tashkil karda meshavad. Okrugi intikhobotiro oid ba intikhoboti Soveti Ittifoq va Soveti Millathoi Soveti Olil SSSR Pre­zidiumi Soveti Olii SSSR tashkil mekunad. Baroi intikhoboti deputathoi Soveti Ittifoq va Soveti Millatho miqdori barobari okrughoi intikhoboti tashkil karda meshavand. …

Okrugi harbii ordeni Bayraqi Surkhdori Osiyoi Miyona, qismhoi harbi, soedineniyaho va muassisahoi kharbi, ki dar territoriyai RSS Tojikiston, RSS Qazoqiston, RSS Qirgizston voqe ast. Bo okrugi harbii Turkiston aloqai uzvi dorad. Bo farmoni Soveti harbii revolyutsionii respublika az 4 iyuni 1926 Fronta Turkiston ba Okrug tabdil doda shud va territoriyai …

Okrugi harbii ordeni Bayraqi Surkhdori Turkis­ton — Okrugi harbii Turkiston dar asosi dekreta Soveti Komissaroni khalqii RSFSR az 4 may soli 1918 bo imzoi V. I. Le­nin tashkil yoft. Soveti Komissaro­ni Khalqi RASS Turkiston bo qarori khud 14 may soli 1918 hayati komis­sariati korhoi harbiro tasdiq kard. Komissariati harbii respub­lika …

Okrugi harbi, dar SSSR ittihodiyai territoriyavii umumiqushunii qismho, soedineniyam, donishkadahoi harbi va muassisahoi gunoguni mahallii harbist. Ba Okrugi harbi farmondehi qushunhoi okrug, ki tobei Vazorati mudofia ast, rokhbari mekunad. Dar Rossiya avvalin Okrughoi harbi solhoi 1862—64 tashkil yoftaand. Dar SSSR avvalin 6 Okrugi harbii Yaroslavl, Moskva, Oryol, Belomor, Ural va …

Oksigen (lotini Oxygenium), Oksigen elementi khimiyavii guruhi VI siste­mai davrii Mendeleev, raqami at. 8, massam at. 15,9994. Oksigenro K. Sheels (1771) dar natijai tafsonidani selitraho (KNO3, N’aNQs), duoksidi mangan (Mp02) va J. Pristli (1774) dar natijai tafsonidani surik (ReO<) va oksidi simob (HgO) novobasta ba yakdigar hosil namudaand. Oksigeni tibii …