radio

nouns

medium for communication
an electronic receiver that detects and demodulates and amplifies transmitted signals
a communication system based on broadcasting electromagnetic waves

verbs

transmit messages via radio waves
"he radioed for help"
is a type of (narrower)
transmit thoughts or feelings
"He communicated his anxieties to the psychiatrist"

adjectives

indicating radiation or radioactivity
"radiochemistry"
pertains to
domain usage
a bound form used only in compounds
"`hemato-' is a combining form in words like `hematology'"