A device used for observing, checking, or keeping a continuous record of something
a heart monitor
A child responsible for distributing bottles of milk at school.
= monitor booth.
A device used to observe and check the rate, rhythm, or some other aspect of the heart
A large heavily built African lizard that has greyish-olive skin with yellow markings and is semiaquatic
A device for monitoring the colour of a television picture (now rare).
A television screen which is used to provide an immediate display of the image being received by a television camera.
A portable device that records the rhythm of the heart continuously, typically for 24-48 hours, by means of electrodes attached to the chest
A large tropical Old World lizard with a long neck, narrow head, forked tongue, strong claws, and a short body. Monitors were formerly believed to give warning of crocodiles