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A mineral of a dark brown color, generally with a fibrous, massive structure. It is a fluophosphate of iron and manganese.

, or pulleylike end, of the humerus, which articulates with the ulna; or the trochlea, or fibrous ring, in the upper part of the orbit, through which the superior oblique, or trochlear, muscle of the eye passes.

neutral and acid sodium carbonate, Na2CO3.2HNaCO3.2H2O, occurring as a white crystalline fibrous deposit from certain soda brine springs and lakes; -- called also urao, and by the ancients nitrum.

To form into a tunnel, or funnel, or to form like a tunnel; as, to tunnel fibrous plants into nests. Derham.

A cord or band of fibrous tissue extending from the bladder to the umbilicus.

- Vitreous sponge (Zoöl.), any one of numerous species of siliceous sponges having, often fibrous, glassy spicules which are normally six-rayed; a hexactinellid sponge. See Venus's basket, under Venus.

a blue to green color, growing darker on exposure. It occurs in monoclinic crystals, also fibrous, massive, and earthy.

A soft mass, especially of some loose, fibrous substance, used for various purposes, as for stopping an aperture, padding a garment, etc. Wed hook, a rod with a screw or hook at the end, used for removing the wad from a gun.

The substance of trees and the like; the hard fibrous substance which composes the body of a tree and its branches, and which is covered by the bark; timber. "To worship their own work in wood and stone for gods." Milton.

- Woolly butt (Bot.), an Australian tree (Eucalyptus longifolia), so named because of its fibrous bark. -- Woolly louse (Zoöl.), a plant louse (Schizoneura, or Erisoma, lanigera) which is often very injurious to the apple tree. It is covered with a dense coat of white filaments somewhat resembling fine wool or cotton.…