from the GNU version of the Collaborative International Dictionary of English
- adj. Of or pertaining to radiotelegraphy; employing, or used or employed in, radiotelegraphy.
from The Century Dictionary and Cyclopedia
- Of or pertaining to wireless telegraphy.
Sorry, no etymologies found.
In conjunction, the many trial methods of automatic radiotelegraphic transmission of observation data as used in America for stratospheric flights will serve a useful purpose.