fibrous

adjective

fi·​brous ˈfī-brəs 

1

a

: containing, consisting of, or resembling fibers

b

: characterized by fibrosis

c

: capable of being separated into fibers

a fibrous mineral

2

: tough, sinewy

fibrous texture

Synonyms of fibrous

• stringy

Examples of fibrous in a Sentence

He had surgery to remove fibrous scar tissue in his knee.

thick, fibrous hair that was not easy to comb

Recent Examples on the Web

Garbage disposals can grind small pieces of food and granules; however, large, hard and fibrous foods will cause clogs and residue over time in the disposal. —Bestreviews, Chicago Tribune, 6 May 2026

Fascia is a continuous web of fibrous tissue that wraps around and supports organs, muscles, bones, and every other structure of the body. —Scott Haak, EverydayHealth.com, 6 May 2026

The scientists found both were composed of a fibrous material that contained many stinging cells called spirocysts, which belong exclusively to the branch of aquatic invertebrates known as cnidarians. —Adam Kovac, Scientific American, 23 Apr. 2026

But closer analysis revealed it was made of fibrous layers packed with stinging cells, pointing to a connection with cnidarians, the group that includes corals and anemones. —Stephen Sorace, FOXNews.com, 23 Apr. 2026

Word History

Etymology

modification of Middle French fibreux, from fibre fiber

First Known Use

1597, in the meaning defined at sense 1a

Phrases Containing fibrous

• fibrous root

Kids Definition

fibrous

adjective

fi·​brous ˈfī-brəs 

1

: containing, consisting of, or resembling fibers

2

: tough entry 1 sense 1b, stringy

Medical Definition

fibrous

adjective

fi·​brous ˈfī-brəs 

1

: containing, consisting of, or resembling fibers

collagen is a fibrous protein

2

: characterized by fibrosis