1. of, relating to, or resembling a filament; consisting of or containing fine threads or fibers
Usage: technical; formal

Examples

• The filamentary structure of the spider's web allows it to catch insects efficiently.
• Under the microscope, the fungus displayed a filamentary growth pattern.
• Filamentary clouds stretched across the evening sky.
• The filamentary roots of the plant penetrated deep into the soil.
• Scientists observed filamentary deposits in the mineral sample.