Gluten (noun)

1. A protein composite found in wheat, barley, and other grains, which gives dough its elasticity and helps it rise when baked.
2. A substance found in certain grains and products made from them, which some people are allergic or intolerant to.

Origin:

From latin gluten "glue", from glūtīn- "glue".

Examples:

1. Many people have trouble digesting gluten, which is found in wheat, barley and rye.
2. The dough was too dry because it didn't have enough gluten.
3. Gluten-free products are becoming increasingly popular as more people are diagnosed with gluten intolerance.
4. Some people believe that gluten is bad for everyone, but this is not supported by scientific evidence.
5. The gluten in wheat flour gives bread its chewy texture and elasticity.