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See sandfly fever.
[Italian pappataci, sandfly : pappare, to eat (from Latin pappāre, from pappa, food) + -taci, silently (from tacito, past participle of tacere, to be silent, from Latin tacēre).]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.