Webster's Revised Unabridged Dictionary · 1913

Harl

Harl (harl) , noun

[Compare Old High German harluf noose, rope; English hards refuse of flax.]

1.
A filamentous substance; especially, the filaments of flax or hemp.
2.
A barb, or barbs, of a fine large feather, as of a peacock or ostrich, -- used in dressing artificial flies.