Definition: A protein produced by B-lymphocytes that binds to a specific antigen.

Alright class, settle down and let’s take a peek, At something important, wonderfully sleek! We’re talking about antibodies, a marvelous thing, Let's break it down, hear what the dictionary sings! “A protein produced by B-lymphocytes…” That’s the start, you see, These cells are busy, working diligently! They make these proteins, strong and true, To help protect our bodies, me and you. “…that binds to a specific antigen.” Now listen close, it's key, An antigen is something foreign, you agree? Like germs or viruses – invaders bold and bright, The antibody locks on tight with all its might! Think of it like a lock and a special key, The antibody’s the key, for you to see. It recognizes the foe, precise and neat, And helps our immune system defend our fleet! So an antibody's job, so clear and grand, Is to target invaders across the land – Or rather, within us, safe and sound, Protecting health all around! Do you have any questions about this clever defense?