S2

Science / Tides and Currents / S2: Principal solar semidiurnal constituent. This constituent represents the rotation of the Earth with respect to the Sun. Speed = 2T = 30.000,000,0° per solar hour.
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S4, S6

Science / Tides and Currents / S4, S6: Shallow water over tides of the principal solar constituent. Speed of S4 = 2S2 = 4T = 60.000,000,0° per solar hour. Speed of S6 = 3S2 = 6T = 90.000,000,0° per solar hour. MORE

Overtide

Science / Tides and Currents / Overtide: A harmonic tidal (or tidal current) constituent with a speed that is an exact multiple of the speed of one of the fundamental constituents derived from the development of the tide-producing force. The MORE

K2

Science / Tides and Currents / K2: Lunisolar semi diurnal constituent. This constituent modulates the amplitude and frequency of M2 and S2 for the declinational effect of the Moon and Sun, respectively. Speed = 2T + 2h = 30.082,137,3° MORE

R2

Science / Tides and Currents / R2: Smaller solar elliptic constituent. This constituent, with T2, modulates the amplitude and frequency of S2 for the effect of variation in the Earth's orbital speed due to its elliptical orbit. Speed = MORE

Licensed Developer

Entertainment / Video Games / Licensed Developer: A company who makes games under the permission of the hardware manufacturer. For example, a developer who wants to make PS2 games must obtain a license from Sony. MORE

Downwardly Compatible

Entertainment / Video Games / Downwardly Compatible: A game machine that still supports games that were made for its predecessor game machine, such as the PS2, which can play PS1 games or the Game Cube Advance, which can play games made for earlier Game MORE