n(nitrogen)氮na(natrium)钠nail①指甲②钉子nailandwirenippers穿钉和钢丝钳nailbrush指甲刷nailcleaner指甲清洁器naildriver骨髓钉打入器nailextension导钉牵引术nailextensionapparatus穿钉牵引器mailextractor骨穿钉拔出器nailfile指甲锉nailhammer穿钉锤nailing插钉术nailnippers指甲钳nail-plate鹅头针nailscissors指甲剪nailset穿针器naked裸露的nakedradiator无保护罩散热器name名称nameofcommodity品名，货名nameofgoods品名，货名nameplate铭牌，商标nano-小，毫微，十亿分之一nanoammeter毫微安计nanogram(abbr.ng)毫微克nanoprogram毫微程序nanoscope毫微秒示波器，超高频示波器nanosecond毫微秒，10-9秒nape项，颈背napkin餐巾narco-麻醉，睡眠narcology麻醉学narcosis麻醉narcotic①麻醉的②麻醉剂naris鼻孔narrow①狭窄的②变窄，限制narrow-nouthbottle小口瓶narrowtube小直径管nasal鼻的nasalairway鼻腔导气管nasalapplicator鼻卷棉子nasalbird-shapedouche鼻用鸟形冲洗器nasalcannula输氧鼻管nasalcatheter鼻腔导管nasalcavity鼻腔nasalcavitycanula鼻腔套管nasalchisel鼻平凿nasalcottonwoolcarrier鼻卷棉子nasalcuret鼻刮匙nasalcutter鼻甲剪nasalcuttingforceps鼻咬骨钳，鼻切钳nasaldilator鼻扩张器nasaldouche鼻用冲洗器nasaldouchenozzle鼻冲洗管嘴nasaldressingforceps鼻敷料钳nasalendoscope鼻镜nasalethnoidpunchforceps鼻筛窦咬取钳nasalfeeding鼻饲法nasalfeedingtube鼻饲管nasalflatround-bladedknife鼻用扁平圆刃刀nasalforeignbodyforceps鼻异物钳nasalglassnozzle鼻用玻璃冲洗管嘴nasalgouge鼻圆凿nasalinstruments鼻用器械nasalirrigator鼻冲洗器nasalknife鼻刀nasalmucosaknife鼻粘膜刀nasaloxygencannula鼻腔给氧插管nasalperiosteumelevator①鼻骨膜起子②鼻骨膜分离器nasalplasticscissors鼻整形剪nasalpolypusforceps鼻息肉钳nasalpolypussnare鼻息肉圈断器nasalprobe鼻探针nasalprosthesis假鼻nasalpunchforces鼻咬取钳nasalrongeur鼻咬骨钳nasalsaw鼻锯nasalscissors鼻剪nasalscoop鼻匙nasalseptum鼻中隔nasalseptumcuttingforceps鼻中隔咬骨钳nasalseptumgouge鼻中隔凿nasalseptumroundchisel鼻中隔圆凿nasalseptumspeculum鼻中隔镜nasalsnare鼻息肉勒除器nasalspeatula鼻铲nasalspeculum鼻镜，鼻窥器nasalsphenoidpunchforceps鼻蝶窦咬取钳nasalsplint鼻夹nasalswivelknife鼻中隔旋转刀，鼻用转轴刀nasaltampon鼻塞nasaltamponforceps鼻腔填塞钳nasaltamponspringforceps鼻腔填塞敷料弹簧镊nasaltrephine鼻环锯nasaltube鼻管，通鼻管nasaluniversalforceps鼻科通用钳naso-鼻naso-antral鼻窦的nasograph鼻测量计nasographicmirror鼻通气检验镜nasomanometer鼻内压力计naso-pharyngealbiopsyforceps鼻咽活检钳，鼻咽活体取样钳nasopharyngealendoscope鼻咽镜naso-pharyngealfibromadissector鼻咽纤维瘤剥离器naso-pharyngesmirror鼻咽镜nasopharyngealsound鼻咽探子nasopharyngealspeculum鼻咽部窥张器nasopharyngofiberscope鼻咽纤维窥镜nasopharyngoscope鼻咽镜nasopharynx鼻咽nasoscope鼻镜nasoseptascope鼻中隔镜nasotrachealtube鼻气管插管nasus鼻natality出生率nation国家，民族nation-wide全国的，全民的native本地的，天然的natrium(abbr.na)钠natuary分娩室naturalimpedance特性阻抗，波阻抗nature①性质②种类nauticalmile海里，里（=1853.2米）navel脐nb(niobium)铌nd(neodymium)钕ndyagmedicalcasersystem钕钇铝石棉石医用激光治疗仪ne(neon)氖nearby附近nearpointreadingcards近距视力检查表nearsight近视nearthrosis人造关节，假关节nearultravioletrays近紫外线nebulization喷雾法nebulizer(abbr.neb)喷雾器，雾化器nec(nipponelictriccompany)日本电气公司necessary①必要的，必需的②必需品nece颈，颈状物neckband围颈带neckstabber刺颈器necltilephone喉头送话器necktube颈管necro-坏死，尸体necrobioticrays生物致死线（短波紫外线）necrocytosis细胞坏死necrodochium停尸室necrometer尸体测量器necropsy尸体剖检necroscopy尸体剖检necrosis坏死necrosisforceps尸骨钳necrotomy①尸体解剖②尸骨切除need①需要②缺乏needle针，指针，针状needleadapter针接头needleandsyringesterilizer针头和注射器消毒器needlebiopsy针吸活组织检查needlebox针盒needlecarrier持针器needlecase针盒needlecuttingforceps断针钳needleelectrode针状电极needleendoscope针状内窥镜needlefile针锉needleforceps持针钳needleguard针套needlehandle针柄needleholder持针器needleholderandforceps持针器和钳needleholdingforceps持针钳needlessdermo-injector皮下无针注射器needlelessdermopressursinjector皮下无针压力注射器needlelessinjector无针注射器needlepoint针尖needlepointtracer针尖描记器（牙科）needleprotector针头保护器negation否定，否认，反对negative①底片，负片②负的，阴的negativebloodpressure负血压negativecarbon阴极碳棒negativecardiogram负性心动图negativecharge阴电荷，负电荷negativeelectricity阴电，负电negativeelectrode负极，阴极negativefeedback负反馈negativefilm照像负片，底片negativehalf-cyclesuppressor负半波遏抑器negativehologram负全息图negativeimage负像negativeion阴离子，负离子negativelens负透镜negativeocular负目镜nagativepotential负电位negativepressure负压negativepressurecatheter负压导管，吸引导管negativevalence负价negatoscope看片灯，观片灯negatron阴电子，负电子negligible微小的，可忽略不计的negotiation谈判，协商neisser'ssyringe奈瑟氏尿道注射器neo-arthrosis人造关节，假关节neodiathermy短波透热法neodymium(abbr.nd)钕neodymiumlaser钕激光器neon(abbr.ne)氖neonatallaryngoscope新生儿喉镜neonatalmonitor新生儿监护仪neonate新生儿neonbulb氖灯，氖灯泡neonlight氖灯nephelo-云，雾，浑浊nepheloid浑浊的nephelometer比浊计，散射浊度计nephelotitrator浊度滴定器nephr-;nephro-肾nephrectomy肾切除术nephrofiberscope纤维肾镜nephrogram肾x线（造影）照片nephrography肾x线造影术nephrolithclamp肾石钳nephropyelopolasty肾盂成形术nephros肾nephroscope肾镜（karl）nephrosonography肾超声波扫描术nephrotomography肾x射线断层照像术neptunium(abbr.np)镎nerve神经nervebristle神经针nervebroach拔髓针nervecanalcleaner神经根管洗髓针nervecanaldrill神经根管钻nervecanalplugger牙神经根管充填管nervecanalreamer神经根管扩孔钻nervedissector神经剥离器nervedissectorwithhook带钩神经剥离器nerveextractionforceps抽取神经钳nervehook神经钩nerveknife神经刀（三叉神经切断刀）nerveprobe神经探子nerveretractor神经牵开器nerverootretractor神经根拉钩nervestimulator神经刺激器nervetracing神经描记法nirvous神经的nervoussystem神经系统nesis①缝②缝线nest①插孔，座②一套，群，组net①网，罩②净的，纯粹的net-export净出口net-import净进口netweight(.wt.)净重network①电路②网状结构，网络networkanalhyzer网络分析器neural神经的neuramebimeter神经反应时间测定器neuramoebimeter神经反应时间测定计neuraxon轴索neure神经元neuro-神经neuro-anatomy神经解剖学neuro-calorimeter神经热量计neurocranium脑颅neurocyte神经细胞neuroelectricity神经电neurogram印象neurography神经学neurokinet连打神经刺激器，神经叩击器neurologicaltestinstrument神经科试验仪器neuron神经元neurophone脑听器neurorrhaphy神经缝术neurosurgicalinstruments神经外科仪器neurotome神经切开刀neurotomy神经切断术neurotonometer皮肤紧张度计neurotransmission神经传递neurotransmitter神经传递介质neurovoltometer神经伏特计neutral中性的，中和的neutralcolourfilter中性滤色器neutrality中性neutralization中和，平衡，抵消neutralizer中和器neutralstain中性染剂neutron中子neutroncounter中子计数器neutroncyclotron中子回旋加速器neutrondiffractometer中子衍射仪neutrongenerator中子发生器neutronray中子射线neutronroentgen中子伦琴neutronspectrograph中子谱仪neutronspectrometer中子光谱计neutrontherapyunit中子治疗机newborn①新生儿②新生的newstudent&teachingpolarizingmicroscope新型教学偏光显微镜newton牛顿（米千克秒制中力的单位，=105达因）newton'salloy牛顿合金（铋铅锡软合金）ni(nickel)镍nibblingforceps持针钳ni-cdbatterycharger镍镉电池充电器nick刻痕，凹痕nickel(abbr.ni)镍nickel-chromiumalloyplates镍铬合金片nickelspatula镍刮铲nicol'sprism尼科尔棱镜nightpail便桶nightvisiontester夜间视力测验器nigral黑质的nigrometer黑度计nil无，零（点）ninefold九倍nineholesshadowlesslamp九孔无影灯nippers镊子，钳子nipple①奶头②喷嘴③螺纹接套nippleprotector乳头保护器nippleshield乳头罩niton(abbr.nt)氡nitrocellulosefilter硝化纤维素滤器nitrogen(abbr.n)氮nitrogerdeterminationsystem氮含量测定系统（生化）nitrogendioxide二氧化氮nitrogenmolecularlaser氮分子激光器nitrogenneedle氮针nitrograph氮气浓度测定仪nitrometer氮素计，氮定量器nmr(nuclearmagneticresonance)核磁共振nmr-ct核磁共振成象装置nmrimagingequipment核磁共振成像装置nmrimaging核磁共振成象nmrspectrometer核磁共振分光计no(1.nobelium2.number)①锘②号码，数目nobelium(abbr.no)锘noblegas惰性气体noblegasalser惰情气体激光器nocufensor外伤防御器，防伤害系统node结，结节noematachograph思考速度描记器noematachometer思考速度测验器noematachymeter思考速度测验器noematic思考的，思想的noetic认识的，智力的noise噪音noiseapparatus噪音计noiseaudiometer噪音听力计noisekiller噪声限制器noiselevel噪声级noisemeasuringinstrument噪声测量仪noisemeter噪音计noisesilencer噪声抑制器，消音器noisetrap抗干扰装置nomenclature词汇，名词汇编，专业术语nominal名义上的，标称的，额定的nominalpower标称功率，额定功率nomogram列线图nomograph列线图解，计算图表non-非，无，不nonabsorbableligature非吸收结扎线nonabsorbablesuture非吸收缝线non-biologicaloscillator非生物振荡器non-contact无触点，非接触non-contacttonometer非接触式眼压计non-invasivebloodgasmeasurement非侵入性血气测定仪，非创伤性血气测定仪noninvasiveloodpressuremonitor无创伤性血压监察仪noninvasivemeasurement无创伤性测量noninvasivetemporarypalemaker无创伤性暂时起转器noninvasivetesting无创伤性检查nonlinearsystem非线性系统non-metal非金属non-mydriaticretinalcamera非散瞳式眼底照像机non-noxiousstimulation无害刺激non-official非法定的nonopaque①透x射线的②透光的non-invaoivecontinuouecaldiawovltputmonitor无创伤血流动力心功能监护仪nonpolarizableelectrode非极化电极non-registeringperimeter无记录视野计non-returnvalve单向活门，单向阀nonrigidventricularcannula挠性心室套管non-screenx-rayfilm无增感屏x射线胶片nonspecific非特异性的non-uniformlyloadedradiumneedle差量镭针nonvolatile①不挥发的②永久性的norm定额，标准，规格normal正常的，标准的normalatmosphere(abbr.an.)标准大气压normalcalomelelectrode标准甘汞电极normalcell标准电池normalcurve常态曲线normaldistribution常态分配normalelectrode标准电极normalexactthermometer标准精密温度计normalhydrometer标准液体比重计normality常态，标准normalization标准化，规格化normallimit正常限度，常限normalpressure正常压力normalthermometer标准温度计normo-正常，标准normobaric正常气压的normogram正常图north北，北方nosaladapter鼻用麻醉接头nose鼻子nosepiece①物镜旋转盘②喷嘴noso-疾病nosocomium医院nostril鼻孔notation符号，标志notch切迹，槽口，切口notchfilter陷波滤波器note笔记，注释notice①注意，留意②通告，简介noticeofarrival到货通知单noticeofclaim索赔通知单notification通知，通告notion意见，概念nought①零②无nov-;novo-新，重新，再novel新奇的，异常的november(abbr.nov.)十一月novocleaner水中洗肠器novoscope叩听诊器nozzle嘴，喷嘴，喷管，吹口np(neptunium)镎n.p.n.(nonproteinnitrogen)非蛋白氮ns(nanosecond)毫微秒nt(niton)氡，镭射气n.t.p.(normaltemperatureandpressure)正常温度与压力nuclearbattery核电池nuclearcardiacprobe核子心脏探头nuclearemulsion核乳胶nuclearenterprise核企业nuclearinstruments核子仪器nuclearmagneticresonance(abbr.nmr)核磁共振nuclearmagneticresonanceimagingsystem核磁共振成像系统nuclearmagneticresonancemagnetometer核磁共振磁强计nuclearmagneticresonancescanner核磁共振扫描仪nuclearmagneticresonancespectrometer核磁共振光谱计nuclearmedicinedataprocessingsystem①核医学数据处理机②核医疗记录处理装置nuclearmedicineequipment核医学装置nuclearphysics核物理学nuclearradiationmeasuringunit核辐射能测量装置nuclearstethoscope核子听诊器nucleicacid核酸nucleometer放射能测定计nucleon核子null①无效的，无价值的②零空mullity①零度②无效number①数，数字②号码numbering编号numeral数字的numeralkeys数字键numeration编号，读数法numerationofleukocyte白细胞计数numericaldisplay数字显示器numeroscope示数器，数字记录器nurse①护士②照管nursecap护士帽nursingbottle喂奶瓶nut螺帽，螺母nutcap螺帽nutrient营养，培养基nutrientsolution培养液nutriment营养，营养品nutschfilter吸滤器nutshell①壳②概要nuvistor小型抗震管nyctometer光觉计，暗视计nylon尼龙，酰胺纤维nylonartificialvessel人造尼龙血管nylonhammer尼龙打诊锤nystagmic眼球震颤的nystagmogoniometer眼球震颤角度计nystagmograph眼球震颤描记器nystagmograph眼球震颤描记术