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rainfall

[reyn-fawl] /ˈreɪnˌfɔl/
noun
1.
a fall or shower of rain.
2.
the amount of water falling in rain, snow, etc., within a given time and area, usually expressed as a hypothetical depth of coverage:
a rainfall of 70 inches a year.
Origin of rainfall
1840-1850
1840-50; rain + fall
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for rainfall

rainfall

/ˈreɪnˌfɔːl/
noun
1.
precipitation in the form of raindrops
2.
(meteorol) the amount of precipitation in a specified place and time
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for rainfall
n.

also rain-fall, "amount of precipitation that falls as rain," 1839, from rain (n.) + fall (n.).

Online Etymology Dictionary, © 2010 Douglas Harper
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rainfall in Science
rainfall
  (rān'fôl')   
The quantity of water, usually expressed in millimeters or inches, that is precipitated in liquid form in a specified area and time interval. Rainfall is often considered to include solid precipitation such as snow, hail, and sleet as well.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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11
14
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