retinitis pigmentosa

[ pig-men-toh-suh, -muhn- ]
/ ˌpɪg mɛnˈtoʊ sə, -mən- /

noun Ophthalmology.

degeneration of the retina manifested by night blindness and gradual loss of peripheral vision, eventually resulting in tunnel vision or total blindness.



We’ve gathered some interesting words donated to English from Portuguese … as well as some that just don’t translate at all. Do you know what they mean?
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Which of the following animal names traces its immediate origin to Portuguese?

Origin of retinitis pigmentosa

1860–65; <New Latin: pigmentary retinitis. See pigment, -ose1 Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

British Dictionary definitions for retinitis pigmentosa

retinitis pigmentosa
/ (ˌpɪɡmənˈtəʊsə) /


a degenerative hereditary disease of the human eye, characterized by pigmentary changes in the retina, night blindness, and eventual loss of vision

Word Origin for retinitis pigmentosa

C19: pigmentosa, feminine of Latin pigmentosus
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

Medical definitions for retinitis pigmentosa

retinitis pigmentosa
[ pĭg′mən-tōsə ]


A hereditary degenerative disease of the retina, producing conditions such as night blindness, pigmentation changes in the retina, narrowing of the visual field, and the eventual loss of vision.pigmentary retinopathy tapetoretinal retinopathy
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Scientific definitions for retinitis pigmentosa

retinitis pigmentosa
[ rĕt′n-ītĭs pĭg′mĕn-tōsə ]

A hereditary degenerative disease of the retina, characterized by difficulty seeing at night, pigmentary changes within the retina, and eventual loss of vision.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.