This page is an entry in the Key.

camera

Most general online definitions of the word “camera” will suffice for discussion on these pages.

For the explanations on this website, the picture-taking aspect of any device that can record photographs is referred to by the term “camera.”

That is true regardless of whether that capability is built into a multipurpose device (smartphone, tablet, watch, eyeglasses) or whether recording photographs is the primary or sole function of the device.