Relating to or composed of filaments; having the structure or appearance of thin threads.
From Latin 'filamentum' (a thread or string), derived from 'filum' (thread). The suffix '-ar' means 'relating to,' making this a technical descriptor for threadlike structures.
Biologists use this term to describe everything from fungal structures to spider silk—substances so strong that a thread the thickness of a human hair could support a car.
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