"MegaPixel" refers to any digital camera CCD or CMOS sensor with over 1 million pixels.
For example the CCD in a 3.34 Megapixel digital camera has 3.34 million individual sensors, each one making up one pixel (short for "Picture Element"). These pixels make up the digital image.

To make it easier to find the camera that's right for you we group cameras together into bands (e.g. 3 to 3.9 Megapixel). For the full low-down on the exact effective resolution (e.g. 3.34 Megapixel), see the individual product description.