What is Lecithin?

Dixie W's Bosch bread recipe called for lecithin.  Some of the ladies asked what it was. Here's a bit of what I found:

LECITHIN - Naturally occurring in soybeans, available in liquid or granule form; used to lightly coat baking pans to prevent sticking (use 1/3 part liquid lecithin with 2/3 part oil); it is a fat emulsifier and can be added to smoothies, in Better Butter recipes, in bread dough and other baked goods. http://realfoodliving.com/faqs/real-foods-glossary

Dough enhancer is listed separately from lecithin in the Bosch "Foolproof Bread" recipe, but lecithin is one of numerous dough enhancers.  Lecithin "[h]elps keep bread fresher longer & works with the gluten to make a lighter bread. It also helps make the bread moister and acts as a mild preservative. Made from soy or egg yolks. Comes in liquid or granular form. Use: 1 Tablespoon per cup of flour." http://www.breadmachinedigest.com/tips/dough-enhancers-and-how-to-use-them.php   Eggs, sugar, honey, oil, everything other than flour, water, yeast and salt are dough enhancers.