This section is from the book "The Home Cyclopedia Of General Information", by Charles Morris. Also available from Amazon: Home Cyclopedia of Necessary Knowledge.
[L. antenna, sail-yard.] Slender articulated organs on the head of insects and Crustacea. There are two in the former, and usually four in the latter. They are used as organs of touch, and in insects are called horns or feelers.
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