Where does this definition of radio tube come from?
This entry for radio tube is sourced from Main Dictionary, one of the dictionaries and corpora merged into Lughet.
Is radio tube a noun, verb, or something else?
In this entry, radio tube is tagged as 2n..
What is Lughet?
Lughet is a free trilingual dictionary covering nearly five million entries across Uyghur, Chinese, and English, drawn from more than ten source dictionaries and corpora.