1970s; earliest use found in International Journal Applied Radiation & Isotopes. From radio- + tag.
radio tag2
/ˈreɪdɪəʊ ˌtaɡ/
noun
A very small radio transmitter that can be attached to an object, animal, etc., to enable its location to be tracked from the radio signals it transmits.
Origin
1970s; earliest use found in Ecological Monographs. From radio- + tag.
radio-tag3
/ˈreɪdɪəʊˌtaɡ/
ChieflyEcology
verb
[with object]To attach a very small radio transmitter to (especially an animal) for the purposes of location tracking.
Origin
1960s; earliest use found in Journal of Mammalogy. From radio- + tag.