FI'BROUS, adjective 1. Composed or consisting of fibers; as a fibrous body or substance. 2. Containing fibers. In mineralogy, a fibrous fracture, is that which presents fine threads or slender lines, either straight or curved, parallel, diverging, or stellated, like the rays of a star.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI