megapixel
noun [ C ] uk/ˈmeɡ.ə.pɪk.səl/ us/ˈmeɡ.ə.pɪk.səl/
兆像素（计算机、数码相机分辩率单位）
one million pixels (= small points that form part of the image on a computer screen), used to measure the amount of detail in images made by a digital camera, computer screen, etc.