N

Word -> "Mot"	Symbol	Unity	Definition
Narrowband sea -> "Houle bande étroite"			Wave system in which the different frequencies are in a narrow band: the "Narrowness parameter" is under a fixed threshold (0.3 to 0.4). The "Crest-to-trough height" is approximately equal to twice the amplitude of the local "Wave envelope"
Narrowness parameter -> "Indice d' étroitesse du spectre"	2		-> see form See also "Spectral width parameters".
Neap tides -> "Marées de Mortes-Eaux"			The tides that follow the first and last Moon quarter.
Nodes -> "Noeuds"			See "Stationary wave".
Nondispersive waves -> "Houle non dispersive"			Waves travelling at the same speed which is the "Group velocity" and also the energy speed.
Nonlinear theories -> "Théories non linéaires"			Higher order theories used to describe high waves or shallow water waves. [3] See also "Stokes theories" and "Stream function theory".