Third-person singular simple present indicative form of relapse.(verb)
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Use "relapses" in a sentence
"Of the 400,000 people in the U.S. afflicted with MS, approximately 85% are initially diagnosed with relapsing-remitting MS, which is characterized by relapses, or attacks of declining neurologic function, followed by periods of remission."
"In clinical trials, patients taking fingolimod had a significantly lower risk of experiencing attacks, known as relapses, than those taking a placebo pill or an older drug called Avonex."
"But my uncles were very kind to me, and told me at once that I was to say no more, only to be thankful that I had not drunk more heartily of the water, and been made ill as the dog, who, in spite of seeming better, kept having what I may call relapses, and lying down anywhere to have a fresh sleep."