ADJ

colour
CCTV, computer, television/TV, video

PREP

on a/the ~
The security staff can see all the outside of the building on their CCTV monitors

ADJ

foetal, heart, oxygen, pulse, radiation

MONITOR + VERB

detect sth
show sth
The heart monitor shows the strength of your pulse

ADJ

EU, UN
UN monitors declared the referendum fair
school
health, peace