[ 'reɪdɪəʊˌsɒnd ]
■ noun dated an instrument carried by balloon or other means and transmitting information about the atmosphere by radio.
Origin
1930s: from radio- + Ger. Sonde 'probe'.
[ 'reɪdɪəʊˌsɒnd ]
■ noun dated an instrument carried by balloon or other means and transmitting information about the atmosphere by radio.
Origin
1930s: from radio- + Ger. Sonde 'probe'.
Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004