Meaning

noun an electrical device that sends or receives radio or television signals

noun sensitivity similar to that of a receptor organ

noun one of a pair of mobile appendages on the head of e.g. insects and crustaceans; typically sensitive to touch and taste

originFrom Latin antenna, antemna (“yard, sailyard; pole”). First used in this sense as a Latin word in the 15th century and as an English word by the end of the 17th century.

Etymology from Wiktionary, CC BY-SA 3.0