- pl. -·nae or -·nas either of a pair of movable, jointed sense organs on the head of most arthropods, as insects, crabs, or lobsters; feeler
- pl. -·nas
- an arrangement of wires, metal rods, etc. used in sending and receiving electromagnetic waves; aerial
- a single rod or wire acting as such an antenna for a small television or radio receiver, cell phone, etc.
Origin of antennaL, earlier antemna, sail yard