1. fine particles of dust and rock found on the surface of the moon

Examples

• The astronauts’ boots were covered in moondust after their moonwalk.
• Scientists studied samples of moondust brought back by the Apollo missions.
• The moondust clung to everything due to the lack of atmosphere on the moon.
• Moondust is much finer than sand found on Earth.
• The spacecraft kicked up clouds of moondust during landing.
• Researchers analyzed the composition of moondust in the laboratory.