Resembling a filament in appearance or structure; having a threadlike or filamentlike quality.
Combines Latin 'filamentum' with the Greek suffix '-oid' (meaning 'resembling' or 'having the form of'). This term describes things that look like filaments but may not technically be one.
Some plant structures are filamentoid—they appear threadlike to the naked eye but under magnification reveal they're actually made of packed cells, showing how nature creates similar forms at different scales.
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