1) Bearing filaments 2) Filamentlike 3) Filiform 4) Long and thin 5) Resembling a thread 6) Thin 7) Thin in diameter 8) Threadlike 9) Thready 1) Filament like 2) Filiform 3) Thin 4) Threadlike 5) Thready 
consisting of filaments or fibres.
• (a.) Like a thread; consisting of threads or filaments.
long and thin. 
long, thin, hair-like.
<cell biology> In the form of very long rods, many times longer than wide. ... (10 Mar 1998) ... 
(fil″ә-men´tәs) composed of long, threadlike structures.
Like a filament.
Thread-like; many times longer than wide.
Fil`a·men'tous adjective [ Confer French filamenteux .] Like a thread; consisting of threads or filaments. Gray. 
Type: Term Pronunciation: fil′ă-men′tŭs Definitions: 1. Threadlike in structure. 2. Composed of filaments or threadlike structures. Synonyms: filiform1
very long and slender
Threadlike.
[adj] - thin in diameter
filamentous Made up of long, interwoven or irregularly placed threadlike structures.
filiform adjective thin in diameter; resembling a thread
composed of or containing filaments. · pertaining to or resembling a filament. · bearing filaments.