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An eclipse of the moon. When the moon enters the shadow of the earth, it appears eclipsed to an observer on the earth. A lunar eclipse is penumbral when it enters only the penumbra of the earth’s shadow, partial when part of its surface enters the umbra of the earth’s shadow, and total if its entire surface is obscured by the umbra.

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A type of magnetometer that measures total magnetic field intensity by observation of the precession frequency of magnetic atoms, usually gaseous rubidium, cesium, or helium, which are magnetized by irradiation with circularly polarized light of a suitable wavelength.


The ratio of working time to total clock time; a ratio of 1.00 (or 100) indicates full utilization of the operator's work time.


An instrument for measuring flow of a liquid in which liquid passing through a chamber causes a disk to nutate, or roll back and forth, and the total number of rolls is mechanically counted.


A dimensionless number used in the study of forced convection which gives a measure of the ratio of the total heat transfer to conductive heat transfer, and is equal to the heat-transfer coefficient times a characteristic length divided by the thermal conductivity. Symbolized NNu.


The code identifying the components in a fertilizer mixture: nitrogen (N), phosphorus pentoxide (P), and potassium oxide (K). Fertilizers are graded in the order N-P-K, with the numbers indicating the percentage of the total weight of each component. For example, 5-10-10 represents a mixture containing by weight 5% nitrogen, 10% phosphorus pentoxide, and 10% potassium oxide. and a detector downstream measures the amount of decay of the resonance, thereby sensing fluid velocity.


1. The time required by a trained worker to perform a task at a normal pace. 2. The total of all the normal elemental times constituting a cycle or operation. Also known as base time; leveled time.


1. Distortion in which the output of a system or component does not have the desired linear relation to the input. 2. [ENG ACOUS] The ratio of the total root-meansquare (rms) harmonic distortion output of a microphone to the rms value of the fundamental component of the output.


In a multimold blowmolding system, the percentage of the total turnaround time actually required for the forming, cooling, and ejection of the formed objects.


The total of the starting and operating tensions in a conveyor.


Maximum total flow from the source to the sink in a connected network.

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