It was an infinitely fine, threadlike projection from the surface of the planet.
A filament is that which is threadlike; as, the filament of silk, or flax.
Her high-arched, threadlike brows were ruffled into a delicious frown.
A slow movement of the bony fingers and the threadlike, silvery thing was withdrawn.
There are nine stamens, with threadlike filaments, often hairy, ...