Fī'ber or Fī'bre, n.

n. [Fr. fibre, from Lat. fibra; Pr., Pg., & It. fibra, Sp. fibra, hebra.]

1. One of the delicate, thread-like or string-like portions of which the tissues of plants and animals are in part constituted, as the fiber of flax or of muscle.
2. Sinew; strength. [Obs. and rare.]

Yet had no fibers in him, nor no force. Chapman. 3. Any fine, slender thread, or thread-like substance; as, a fiber of spun glass; especially, one of the slender rootlets of a plant.