1. plural of lumen; the hollow spaces or cavities within tubular structures
Usage: medical; anatomical

Examples

• The lumina of the blood vessels were examined under the microscope.
• Arterial lumina can become narrowed due to plaque buildup.
• The researcher measured the diameter of the lumina in the tissue samples.
• Inflammation can cause swelling that reduces the lumina of airways.
• The pathologist noted irregular lumina in the biopsy specimen.