water-fall

wa·ter·fall

[waw-ter-fawl, wot-er-]
noun
1.
a steep fall or flow of water in a watercourse from a height, as over a precipice; cascade.
2.
a manner of arranging women's hair, as in long, loose waves.

Origin:
before 1000; Middle English; Old English wætergefeall. See water, fall

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Based on the Random House Dictionary, © Random House, Inc. 2013.
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Collins
World English Dictionary
waterfall (ˈwɔːtəˌfɔːl) [Click for IPA pronunciation guide]
 
n
a cascade of falling water where there is a vertical or almost vertical step in a river

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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00:10
Water-fall is always a great word to know.
So is doohickey. Does it mean:
a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question.
a gadget; dingus; thingumbob.
Etymonline
Word Origin & History

waterfall
O.E. wætergefeal; see water + fall. Cf. Ger. wasserfall, O.N. vatnfall.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

waterfall wa·ter·fall (wô'tər-fôl')
n.
Blood flow in vascular beds where lateral pressure greatly exceeds venous pressure and tends to collapse vessels.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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