1. of, relating to, or consisting of a thread or threads; threadlike
Usage: technical; formal
2. relating to or using a fine wire or thread, especially in optical instruments for precise measurement or alignment
Usage: technical; astronomy; microscopy

Examples

• The filar structure of the spider's web allows it to catch insects efficiently.
• Astronomers use filar micrometers to measure the positions of stars with great precision.
• The microscope's filar eyepiece contains crosshairs for accurate observation.
• Filar fungi spread through the soil in threadlike networks.
• The filar apparatus in the telescope enables precise angular measurements.