Oligofreniya (az oligo… va rgep — aql), guruhi bemorihoi modarzodi yo gayrimodarzodist, ki dar sinni kudaki dar natijai ba qadri kofi inkishof nayoftani aql ba vujud meoyad. Hangomi Oligofeniya, ba gayr az kaiaqli, aksar vaqt inkishof nayoftani qad, vayronshavii mutanosibii sokhti badan, sari vaqt ba balogat narasidan, ikhtiloli nutq, harakat, …

Olami organiki, majmui organiamhoe, ki dar biosferai Zamin maskunand. Olami organiki az mikroorganizmho, rastaniho, hayvonot va odam, ki dar prosessi faoliyati khud ba yakdigar va tabiati gayrizinda tasir merasonand, tarkib yoftaast.

Oligofrenopedagogika, sohai defektologiya ast, ki masalahoi tarbiya va talim, rohhoi islohi norasoii inkishofi bachahoi zaifaql, inchunin masalahoi barqarorkunii salomatii onhoro meomuzad. Dar avvali asri 19 dar inkishofi tib va pedagogika hamchun raviyai muayyane ba vujud omad. Sistemai tarbiya va talimi bachahoi zaifaqlro bori avvvl dukhtur va peda­gogi fransavi E. Segen …

Olati Arifmetiki (OA), yake az olati asosii hisobmoshini raqa­mii elektronist (HRE), ki dar on bevosita amalhoi arifmetiki va mantiqi bar adadho ijro karda meshavand. Ijroi har guna amali arif­metiki yo mantiqi dar Olati Arifmetiki aslan az ijroi pay dar pai yak qator amalhoi elementari yo mikroamalho [muqarrar namudani «sifri»-i razryadhoi …

Oligosen (az oligo va yunoni kainos — nav), zamoni (qismi) oligosen, zamoni okhiri paleo­gen. Istilohi «Oligosen»-ro bori avval soli 1855 geologi nemis G. Beyrikh ba ilm jori kardaast. Tahnishasthoi zamoni Oligosenro ba du, bazan ba se tabaqa (yarus) taqsim mekunand va dar yak tabaqa nomi mahalli dorad.

Oktava (az lotini octava — hashtum), dar musiqi, 1) fosilaest, ki hasht zinai qatorovozi diatoniki yo shash pardai yaklukhtro darbar megirad: 1 oktava = 1200 sent  301 savar. 2) Zinai hashtumi qatorovozi diatoniki. 3) Yak qismi qatorovozi musiqi, ki ba on zinahoi asosii musiqi (do, re, mi, fa, sol, lya, …

Oktametil, oktametil tet­ramidi kislotai pirofos­fat, ((SN3) 2Nb POOOP(N (GH3) 2J, vositai khimiyaviest baroi mahvi kana va hasharoti zararrasoni rastanihoi sitrusi, tut va digar darakhtoni meva.

Okrugi Avtonomii Chukot, dar hayati viloyati Magadani RSFSR. Dar Shimoli Sharqi SSSR voqe ast. 10 dekabri 1930 tashkil shudaast. Okrugi avtonomii Chukot nimjazirai Chukotro, ki ba on qismi materik va jazirahoi Vrangel, Ayon, Arakamchechen, Ratmanov va gayra dokhil meshavand, darbar megirad. Onro bahrhoi Sibiri Sharqi, Chukot va Be­ring ihota kardaand. …

Oktan, noktan, karbogidridi ser C8Hie; moei berang buda bui makhsus dorad. t gudozish— 56,8° Selsiya; t jushish 125,67° S; zichiash 702,5 kilogramm/metr3 (20* S). Adadi oktaniash 17—19 ast. Yakjoya bo izooktan va digar izomerhoyash dar neft, benzin (to 10%), inchunin ba miqdori ziyod dar benzini sintezie, ki az SO va …

Okrugi Avtonomii Khantiyu Man­siho, dar hayati viloyati Tyumeni RSFSR. 10 dekabri 1930 tashkil shuda­ast (to 23. 10. 1940 Okrugi millii Ostyako-Vogulsk, to 1977 Okrugi millii Khantiyu Mansi). Dar qismi markaezii hamvorii Sibiri Garbi voqe ast. Masohat 523,1 hazor kilometr3. Aholiash 569 hazor nafar (1979). Markazash shahri Khanti-Mansiysk. Ba 7 rayon …