flu(redirected from FLUS)
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acute, highly contagious disease caused by a RNA virus (family Orthomyxoviridae); formerly known as the grippe. There are three types of the virus, designated A, B, and C, but only types A and B cause more serious contagious infections.
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1. short for influenza
2. any of various viral infections, esp a respiratory or intestinal infection
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005