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koilonychia

American  
[koi-loh-nik-ee-uh] / ˌkɔɪ loʊˈnɪk i ə /

noun

Medicine/Medical.

  1. an abnormal condition in which the outer surfaces of the nails are concave; spoon nail.

Etymology

Origin of koilonychia

1900–05; < Greek koîl ( os ) hollow + onych- (stem of ónyx nail; onyx ) + -ia

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.