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

Bainton said the aim of surgery is always to remove the affected tissue while preserving healthy organs, but that this can be challenging because endometriosis can cause fibrosis and may infiltrate nearby structures.

From BBC • Apr. 4, 2026

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

Smith, a guide dog trainer was diagnosed with pulmonary fibrosis, an incurable lung disease, in 2019 and was medically retired from her job working with children with learning difficulties.

From BBC • Mar. 20, 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

Mom explained that she had pulmonary fibrosis, and it was getting worse, but I was seven years old, and pulmonary fibrosis were two big, grown-up words I didn’t understand.

From "Courage to Soar" by Simone Biles