tid·​al | \ˈtī-dᵊl \

Definition of tidal 

1a : of, relating to, caused by, or having tides tidal cycles tidal erosion

b : periodically rising and falling or flowing and ebbing tidal waters

2 : dependent (as to the time of arrival or departure) upon the state of the tide a tidal steamer

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Other Words from tidal

tidally \ ˈtī-​dᵊl-​ē \ adverb

Examples of tidal in a Sentence

Recent Examples on the Web

Which means the guy not only knows about event horizons and gravitational lensing but stuff like tidal forces (what!), x-ray binaries (hey now!), and active galactic nuclei (oh my god!). Robbie Gonzalez, WIRED, "An Astronomer Explains Black Holes at 5 Levels of Difficulty," 5 July 2018 Boat to them, scoop them out of the bay and slurp them up on a tidal flat. Richard Stenger, SFChronicle.com, "Everything you need to know about the oyster capital of California," 3 July 2018 The most obvious suggestion is that tidal forces from the Sun are somehow responsible. Scott K. Johnson, Ars Technica, "Huge wave in Venus’ clouds changes the length of a day," 22 June 2018 One reason Bostonians were aware of tidal cycles: everything smelled better at high tide. Courtney Humphries, BostonGlobe.com, "Boston vs. the rising tide," 28 Apr. 2018 The rest of the core materials may experience radioactive decay and tidal forces to stay hot, which also heats up the water into super-hot jets moving toward the north and south pole. John Wenz, Popular Mechanics, "Enceladus Has a Porous Core That Keeps Its Ocean Hot," 6 Nov. 2017 In addition, the new moon will generate higher-than-normal tides Thursday, Friday, and Saturday, the weather service says, and swells associated with Chris could exacerbate any tidal flooding and result in minor beach erosion. Anthony R. Wood, Philly.com, "Tropical Storm Chris could become hurricane and affect Jersey beaches; Beryl making comeback?," 10 July 2018 Thousands - tens of thousands, really - of fingernail-size menhaden hung in there, moving like a giant, glittering amoeba, all facing into the flow and feeding on phytoplankton carried to them on the conveyor belt that was the tidal current. Shannon Tompkins, Houston Chronicle, "Bay food chain comes to life with tide change," 14 Apr. 2018 Years ago, before 2010, the tidal gauge at Virginia Key showed high tide floods maybe twice a year. Alex Harris, miamiherald, "Miami streets could flood every single day by 2070 under many climate models, NOAA says | Miami Herald," 30 Mar. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'tidal.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of tidal

1807, in the meaning defined at sense 1a

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Last Updated

12 Nov 2018

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Time Traveler for tidal

The first known use of tidal was in 1807

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English Language Learners Definition of tidal

: of or relating to tides : rising and falling at regular times


tid·​al | \ˈtī-dᵊl \

Kids Definition of tidal

: of or relating to tides : flowing and ebbing like tides


tid·​al | \ˈtīd-ᵊl \

Medical Definition of tidal 

: of, relating to, or constituting tidal air interference with the normal tidal exchange of the lungs— F. R. Mautz & R. M. Hosler

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full of whispering sounds

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