omnidirectional

adjective3

1. •
   In every direction, especially of a radio system capable of transmitting or receiving signals in all directions, or of a microphone capable of detecting sound from all directions.

   • An omnidirectional radio beacon.
2. •
   Having a ring-shaped radiation pattern, with equal radiation in all azimuthal directions.

   • The radiation pattern of an omnidirectional antenna looks like a doughnut, with the antenna in the center of the doughnut, as depicted in Figure 17.1. — 2004
3. •
   (rare) Of such an attack or effect: that encompasses all directions.

   • Any defense posture that he may have that would be common for any ballistic missile would not suffice for a low-altitude omnidirectional high-speed nuclear ramjet missile. — 1962