1. having small holes or openings; porous or perforated
Usage: technical or scientific usage; rare in everyday English

Examples

• The foraminous structure of the bone allows blood vessels to pass through.
• Foraminous rocks are common in volcanic regions.
• The foraminous membrane permits the passage of certain molecules.
• Scientists examined the foraminous surface under a microscope.
• The foraminous nature of the material made it ideal for filtration.