1. A genus of brown seaweed or kelp found in coastal waters.
Usage: biology; often capitalized when referring to the genus
2. Paint, cosmetics, or other substances used to color or decorate the face; makeup.
Usage: archaic; literary

Examples

• The rocky shore was covered with fucus that swayed in the tide.
• Marine biologists study fucus to understand coastal ecosystems.
• In Renaissance times, women applied fucus to enhance their appearance.
• The fucus genus includes species adapted to harsh intertidal zones.
• Ancient texts describe the use of fucus as a form of theatrical makeup.