ADR Gauge: Analog to Digital Recording water level gauge. A float or pressure-actuated water level gauge that records heights at regular time intervals in digital format.

 

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ADR Gauge: Analog to Digital Recording water level gauge. A float or pressure-actuated water level gauge that records heights at regular time intervals in digital format.

Tide Gauge: An instrument for measuring the rise and fall of the tide (water level). See ADR gauge, automatic tide gauge, Next Generation Water Level Measurement System, gas purged pressure gauge, elect . . . View Full Definition

Quadriceps: The muscle located on the front of the thigh - upper leg. This muscle group is used to extend the knee.

Quadrature Phase-Shift Keying (QPSK): A method of modulating digital signals using four phase states to code two digital bits per phase shift.

Quadrille: A 19th century square dance written for 4 couples.

Quadrivium: Subdivision of the seven liberal arts: includes the mathematical subjects of music, arithmetic, geometry and astronomy.

Quadrature Of Moon: Position of the Moon when its longitude differs by 90° from the longitude of the Sun. The corresponding phases are known as first quarter and last quarter.

Quadrupedian Signs: Alternate term for bestial signs. See bestial signs.

Quadratic Programming: Variant of linear programming in which the objective function is quadratic rather than linear. In portfolio selection, we often minimize the variance of the portfolio (which is a quadratic f . . . View Full Definition

Quadraplane: An aircraft having four or more wingforms.