the collection or mass of filaments growing from the skin of an animal, and forming a covering for a part of the head or for any part or the whole of the body.-one the above-mentioned filaments, consisting, in invertebrate animals, of a long, tubular part which is free and flexible, and a bulbous root imbedded in the skin.-hair (human or animal) used for various purposes; as, hair for stuffing cushions.-a slender outgrowth from the chitinous cuticle of insects, spiders, crustaceans, and other invertebrates. such hairs are totally unlike those of vertebrates in structure, composition, and mode of growth.-an outgrowth of the epidermis, consisting of one or of several cells, whether pointed, hooked, knobbed, or stellated. internal hairs occur in the flower stalk of the yellow frog lily (nuphar).-a spring device used in a hair-trigger firearm.-a haircloth.-any very small distance, or degree; a hairbreadth.