
1) Undulation 2) Water wave 3) Wave
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https://www.crosswordclues.com/clue/seiche

cuttlefish.
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http://chocolateandzucchini.com/french-english-food-glossary/

A free or standing wave oscillation of the surface of water in an enclosed basin that is initiated by local atmospheric changes, tidal currents, or earthquakes. Similar to water sloshing in a bathtub.
Found on
http://earthquakescanada.nrcan.gc.ca/info-gen/glossa-eng.php

A seiche (ʃ {respell|SAYSH|`}) is a standing wave in an enclosed or partially enclosed body of water. Seiches and seiche-related phenomena have been observed on lakes, reservoirs, swimming pools, bays, harbours and seas. The key requirement for formation of a seiche is that the body of water be at least partially bounded, allowing the formation ....
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http://en.wikipedia.org/wiki/Seiche

periodic side-to-side fluctuation of body of water
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http://phrontistery.info/s.html

rhythmic oscillation of water in a lake or a partially enclosed coastal inlet, such as a bay, gulf, or harbour. A seiche may last from a few minutes ... [7 related articles]
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http://www.britannica.com/eb/a-z/s/59

An oscillation of a fluid body in response to a disturbing force having the same frequency as the natural frequency of the fluid system. Tides are now considered to be seiches induced primarily by the periodic forces caused by the sun and moon.
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http://www.encyclo.co.uk/local/20124

A standing wave in a closed body of water such as a lake or bay. It can be characterized as the sloshing of water in the enclosing basin. Seiches can be produced by seismic waves from earthquakes. The permanent tilting of lake basins caused by nearby fault motions has produced very energetic seiches.
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http://www.encyclo.co.uk/local/20129

seiche. The sloshing of a closed body of water from earthquake shaking. Swimming pools often have seiches during earthquakes.
Found on
http://www.encyclo.co.uk/local/21456

cuttlefish.
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http://www.patriciawells.com/glossary/

large squid
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http://www.slowtrav.com/france/restaurants/glossary.htm

[
n] - a wave on the surface of a lake or landlocked bay
Found on
http://www.webdictionary.co.uk/definition.php?query=seiche

seiche (SAYSH) An internal wave oscillating in a body of water or it is the sloshing of the water in a swimming pool, or any body of water, caused by the ground shaking in an earthquake.
Found on
http://www.wordinfo.info/words/index/info/view_unit/4096/

An oscillation of a fluid body in response to a disturbing force having the same frequency as the natural frequency of the fluid system. Tides are now considered to be seiches induced primarily by the periodic forces caused by the sun and moon.
Found on
https://www.encyclo.co.uk/local/20687
noun a wave on the surface of a lake or landlocked bay; caused by atmospheric or seismic disturbances
Found on
https://www.encyclo.co.uk/local/20974
No exact match found.