Source : Webster's Revised Unabridged Dictionary (1913)

Icarian \I*ca"ri*an\, a. [L. Icarius, Gr. ?, fr. ?, the mythic
   son of D[ae]dalus, who, when flying from Crete on wings
   cemented with wax, mounted so high that the sun melted the
   wax, and he fell into the sea.]
   Soaring too high for safety, like Icarus; adventurous in
   flight.