gallic acid (noun)

1. Gallic acid is sometimes used as a symbol of purification in certain religious ceremonies.

2. The use of gallic acid in architectural preservation helps to maintain the original color and texture of historic buildings.

3. The movie depicted a laboratory scene where scientists synthesized gallic acid to study its antioxidant properties.

4. In the futuristic world of the novel, gallic acid was a key component of a revolutionary energy source that powered spaceships.