Nefelin (az yun. nephe1e — abr), mineral az sinfi silikatho. Tarkibi khimiyaviash KNa3[AlSiO4]4. Odatay dar tarkibash khele bisyor silitciy va chun omekhta kalsiy, mag­niy, bazan ohan, berilliy, khlor, ob, galliy ham dorad. Sistemai kristallbandiash geksagonali. Agregathoi yaklukhti donador, bazan kristallhoi kutohi priamamonand hosil menamoyad. Berang, gulobirang, khokistarrang yo sabzrang meshavad. …

Nenesho (khud nenes guyand), khalqest sokini qismi ziyodi shimoli SSSR az nimjazirai Kolsk to sohilhoi rosti poyonobi Enisey. Aksariyati Nenesho dar RSFSR: okrughoi avtonomii Nenesi viloyati Arkhangelsk, Yamalu Nenesi viloyati Tyumen; Taymiri (Dolchanu Ne­nes) kishvari Krasnoyar zindagi meku­nand. Shumoraashon 30 khazor nafar (1979). Ba zaboni nenesi gap mezanand. Ajdodi Nenesho …

Nepal, Podshohip Nepal, davlatest dar Osiyoi Janubi. Dar qismi markazii Himoloy voqest. Dar  Shimol bo RKhKh, dar Janub Garb va Sharq bo Hinduston khamsarhad ast. Masohat 140.8 hazor kilometr2. Aholiash 14,179 million nafar (1981). Poytakhtash — Katmandu. Nepal az jihati mamuri ba 14 mintaqa (anchol) va 75 rayon taqsim shudaast. …

Nefertiti, malikai Misri Qadim (okhiri asri 15— avvali asri 14 to melod), zavjai Amenkhotepi IV (Ekhnaton). Zohiran dar guzaronidani islohoti dinii shavharash ishtirok doshtaast, ki pas az on nomi Nefer-Neferu-Aton («Husnu jamoli Aton behamtost»)- ro girift. Soli 1912 hangomi hafriyoti arkheologi dar Al-Amorna ustokhonai haykaltarosh Tutmes va mujassamahoi Nefertiti yoft …

Neogen (az neo… va yun. Renos — tavallud, sin), dar geologiya davrai duyumi erai kaynozoro guyand. Tabaqai jinshoi kuhie, ki dar in davra ba vujud omadaand, mutaalliqi sistemai neogenand. Davrai Neogen 25 million sol muqaddam cap shuda, beshtar az 23 million sol davom kardaast. Istilohi Neogenro bori nakhust soli 1853 …

Neper, vohidi buzurgii logarifmii nisbi (logarifmi naturalii nisbati du buzurgii fizikii hamnom). Ba nomi J. Ne per guzoshta shudaast. Ishoratash — Hu yo Np.  Hangomi F2/F1 = e budan, 1 Np = ln{F1/F2) ast, ki dar on Ft va F2 — buzurgihoi fizikii «quvvagi» (shiddat, quvvai jarayon, fishor va gayra) …

Neodim (lotini Neodymium), Nd, J elementi khimiyavii guruhi III sis temai davrai Mendeleev, mansubi Lantanoidho. Raqami at. 60, massai _ at. 144,24. 7 izotop» sobit dorad. Neodim metalli safedi nuqratob buda, zichiash 7000 kg/m3, t gudozish 1024° Selsiya, t d jushish 3030° Selsiya ast. Rangi namakhoi Neodim bunafsh va surkhtoband. …

Neptun dar asotiri Rimi Qa­dim khudoi chashmayu daryoho. Badtar uro barobari khudoi Yunoni Qa­dim — Poseydon meparastidand. Ba sharafi Neptun idi qadimi (Neptupalii) har sol 23 iyul jashn girifta meshud. Manoi majozii Neptun— ofati bahri.

Nefrit (az yun. nephros — gurda; dar zamoni qadim chunin mepindosh- tand, ki Nefrit ba dardi gurda davost), yak navi mineralhoi aktinolit va tremolit. Sokhti darunii Nefrit az nakhhoi baso mahini mikroskopii no- muntazam iborat ast. Rangash safed, zard, surkh, siyoh, sabz, bazan rangorangi naqshin yo rakh-rakh meshavad. Takhtachahoi tunuki …

Neyston (az yun. neustos — shinovar) organizmhoe, ki ba pardai qabati boloii ob chaspida dar rui on (e p i n e y s t o n) yo dar zeri on (g i p o n e y s t o n) harakat mekunand. Ba Neyston soddatarinho, obsabzhoi yakhujayragi, gambuskhoi …