malformation

From mal- + formation.

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malformation (countable and uncountable, plural malformations)

1. An abnormal formation.
   • 1886 January 5, Robert Louis Stevenson, “Search for Mr. Hyde”, in Strange Case of Dr Jekyll and Mr Hyde, London: Longmans, Green, and Co., →OCLC, page 25:

     Mr. Hyde was pale and dwarfish, he gave an impression of deformity without any nameable malformation, he had a displeasing smile, he had borne himself to the lawyer with a sort of murderous mixture of timidity and boldness, and he spoke with a husky, whispering and somewhat broken voice; […]

2. (teratology) An abnormal developmental feature of offspring.

• arteriovenous malformation
• Chiari malformation
• Dandy-Walker malformation
• Arnold-Chiari malformation

• deformation

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malformation f (plural malformations)

1. malformation

• “malformation”, in Trésor de la langue française informatisé [Digitized Treasury of the French Language], 2012