Dictionary.com
definitions

pneumonitis

[noo-muh-nahy-tis, nyoo-]

noun Pathology.

inflammation of the lung caused by a virus or exposure to irritating substances.

Origin of pneumonitis

From New Latin, dating back to 1815–25; see origin at pneumon-, -itis
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
British Dictionary definitions for pneumonitis

pneumonitis

noun

inflammation of the lungs
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
pneumonitis in Medicine

pneumonitis

[nōō′mə-nī′tĭs]

n.

Inflammation of lung tissue.pulmonitis
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.