Ornith. [ad. mod.L. fīloplūma, badly f. L. fīlum thread + plūma feather. (The correct L. form would be *fīliplūma.)] (See quot. 1890.)
1884. Syd. Soc. Lex., Filoplume.
1890. Coues, Field & Gen. Ornith., II. § 3. 128. Different kinds of Feathers. 4. Filoplumes, filoplumæ, or thread-feathers, have an extremely slender, almost invisible stem … and usually no vane, unless a terminal tuft of barbs may be held for such…. These are the nearest approach to hairs that birds have.
