from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun A pathological condition resulting from a disease.
  • noun A secondary consequence or result.

from The Century Dictionary.

  • noun That which follows; a following.
  • noun In pathology, the consequent of a disease; a morbid affection which follows another, as cardiac disease after acute rheumatism, etc.

from the GNU version of the Collaborative International Dictionary of English.

  • noun An adherent, or a band or sect of adherents.
  • noun That which follows as the logical result of reasoning; inference; conclusion; suggestion.
  • noun (Med.) A morbid phenomenon left as the result of a disease; a disease resulting from another.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun pathology A disease or condition which is caused by an earlier disease or problem.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun any abnormality following or resulting from a disease or injury or treatment


from The American Heritage® Dictionary of the English Language, 4th Edition

[Latin sequēla, sequel; see sequel.]

from Wiktionary, Creative Commons Attribution/Share-Alike License

Latin sequela, from sequi ("follow"). Compare sequence.


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  • "The overwhelming majority of victims, especially in the Western world, recovered quickly and fully. This was after all only influenza. But the virus sometimes caused one final complication, one final sequela. The influenza virus affected the brain and nervous system. All high fevers cause delirium, but this was something else."

    —John M. Barry, The Great Influenza (NY: Penguin Books, 2004), 378

    February 17, 2009

  • Raynaud's phenomenon is often a sequela.

    March 3, 2017