'Ballooning spider' definitions:

Definition of 'Ballooning spider'

From: GCIDE
  • Ballooning spider \Bal*loon"ing spi"der\ (Zool.) A spider which has the habit of rising into the air. Many kinds (esp. species of Lycosa) do this while young by ejecting threads of silk until the force of the wind upon them carries the spider aloft. [1913 Webster]