Other forms: megapixels
A megapixel is a million of the tiny squares that make up an image. A twelve megapixel camera, more megapixels, the megapixel count.
It has been the wrong thing to shop by for twenty years, since the lens and the sensor size matter more. Beyond about twelve, a megapixel buys you cropping room rather than a better picture.
1nounmegapixelA million of the tiny squares in an image.
“The phone claims fifty megapixels and combines them into twelve.”
megapixel is a unit.
From mega- + pixel.
Etymology from Wiktionary, CC BY-SA