Debye-Scherrer method
德拜-谢乐法，粉末照相法

• lux-hour
• Luxmeter
• lux-second
• lyear
• Lyman-alpha radiation
• Lyman band
• Lyman continuum
• Lyman ghost
• Lyman series
• lyo-luminescence
• Lyot coronograph
• Lyot depolarizer
• Lyot filter
• Lyot-Ohman filter
• Lyot's filter
• Lyoyd's mirrorr
• mach
• Mach band phenomenon
• machine
• Machine cycle
• machine flinishing
• machine-gun sight
• Machine language
• machinery
• machine tool