fibrosis

American  

[fahy-broh-sis] / faɪˈbroʊ sɪs /

noun

Pathology.

1. the development in an organ of excess fibrous connective tissue.

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fibrosis British  

/ faɪˈbrəʊsɪs, faɪˈbrɒtɪk /

noun

1. the formation of an abnormal amount of fibrous tissue in an organ or part as the result of inflammation, irritation, or healing

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Other Word Forms

• fibrotic adjective

Etymology

Origin of fibrosis

First recorded in 1870–75; fibr- + -osis

Example Sentences

The company reported that the Tyvaso trial, TETON-1, showed a magnitude of improvement in treating idiopathic pulmonary fibrosis, or IPF, when compared with the first Phase 3 trial.

From Barron's • Mar. 30, 2026

The crown princess, 52, who suffers from the lung disease pulmonary fibrosis, made clear that everything depended on her state of health.

From BBC • Mar. 20, 2026

As well as seeing her eldest child on trial in Norway's biggest court spectacle for years, Mette-Marit is suffering from ill health, having contracted the lung disease pulmonary fibrosis.

From BBC • Mar. 19, 2026

Vertex is trying to expand beyond its treatments of cystic fibrosis, which have helped power its total market capitalization above $100 billion.

From Barron's • Mar. 10, 2026

This isn’t the first time my cystic fibrosis has taken me out of the running for some class trip or sunny vacation or school event.

From "Five Feet Apart" by Rachael Lippincott