Definition of wool :
1. A sort of pubescence, or a clothing of dense, curling hairs on the surface of certain plants.
2. Short, thick hair, especially when crisped or curled.
3. The soft and curled, or crisped, species of hair which grows on sheep and some other animals, and which in fineness sometimes approaches to fur; -- chiefly applied to the fleecy coat of the sheep, which constitutes a most essential material of clothing in all cold and temperate climates.
fabric (part of speech: adjective)
damask, seersucker, sharkskin, Acrilan, flannel, chiffon, sacking sailcloth, cheesecloth, crepe, challis, Dacron, Celanese, grenadine, Jersey, batik, muslin, worsted, paisley, baize, quilting, tarpaulin, gossamer, cambric, tulle, satin, herringbone, burlap, foulard, silk, fabric, oilcloth, bunting, broadcloth, crinoline, cotton, gingham, rayon, percale, horsehair, moleskin, tricot, linen, serge, fleece, net, astrakhan, chintz, corduroy, felt, velour, duffel, taffeta, longcloth, sateen, velvet, lame, nylon, mohair, denim, canvas, Orlon, suede, alpaca, chenille, calico, plaid, gabardine, tweed, madras, twill, matting, brocade, cashmere
fiber (part of speech: noun)
- 1477. Do you buy your own wool? - "Second Shetland Truck System Report", William Guthrie.
- I saw sheep heads with the wool on at one place and stood around to learn what disposition of them was being made, but no customers came along. - "Epistles-from-Pap-Letters-from-the-man-known-as-The-Will-Rogers-of-Indiana", Durham, Andrew Everett.
- Cold days are coming and Nature makes the lamb's wool nice and warm." - "The Girl and Her Religion", Margaret Slattery.