1. extremely small crystals that are visible only under a microscope
Usage: scientific; plural form

Examples

• The scientist observed microcrystals forming in the solution.
• Microcrystals of salt appeared when the water evaporated quickly.
• The pharmaceutical company studied drug microcrystals to improve absorption.
• Under the microscope, we could see tiny microcrystals scattered throughout the sample.
• The formation of microcrystals affects the material’s optical properties.
• Researchers analyzed the microcrystals to understand the crystallization process.