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

According to the Mayo Clinic, the Achilles tendon is a strong, fibrous tendon that connects the calf muscles to the heel bone and allows a person to point their foot downwards, stand on their toes and walk properly. —Keisha Rowe, Louisville Courier Journal, 26 Feb. 2026

This fibrous gel later gets broken down by bacteria in the large intestine, which ends up providing a small amount of calories, per the FDA. —Carolyn L. Todd, SELF, 23 Feb. 2026

Most fiber lives in the skins and fibrous meat of fruits and vegetables. —Brandi Jones, Health, 23 Feb. 2026

Keep in mind that the texture is firmer and more fibrous than the rest of the onion. —Olivia McIntosh, Martha Stewart, 22 Feb. 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