megascope
(1)显微幻灯，扩大照相机
(2)粗视显微镜

• metering system
• meter-kilogram-second system
• methacrylate
• methacrylic acid ester
• methane
• methane-stabilized laser
• methanol
• method of amjorant
• method of coincidence
• method of difference
• method of indution
• method of iteration
• method of least squares
• method of minimum squares
• method of perturbing concentration
• method of random sampling
• method of speparation of variable
• method of steepest descent
• method of substitution
• method of trial
• method of truncation
• methyl alcohol
• methylation
• methylene blue
• methylene iodide