Definition of radiosondage in English:

radiosondage

noun

Meteorology
  • Measurement or observation in the atmosphere by means of a radiosonde.

Origin

1930s. From radiosonde + -age, perhaps after French radiosondage (although this is apparently first attested later: 1942).

Pronunciation

radiosondage

/ˈreɪdɪə(ʊ)sɒndɪdʒ/