Relating to or measured in decametres, units of 10 meters.
From decametre + -ic (suffix forming adjectives). A straightforward adjectival form describing measurement in decametres.
Decametric wavelengths in radio broadcasting (10-100 meters) include some shortwave bands that let people communicate across continents using relatively simple equipment.
Complete word intelligence in one call. Free tier — 50 lookups/day.