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tropical storm

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noun Meteorology.
  1. a tropical cyclone of less than hurricane force.

Origin of tropical storm

First recorded in 1940–45
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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tropical storm in Science

tropical storm

  1. A tropical cyclone having sustained surface winds between 39 and 73 mi (63 and 118 km) per hour. See Note at cyclone.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.