Primary

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PRIMARY. That which is first or principal; as primary evidence, or that evidence which is to be admitted in the first instance, as distinguished from secondary evidence, which is allowed only when primary evidence cannot be had.
     2. A primary obligation is one which is the principal object of the contract; for example, the primary obligation of the seller is to deliver the thing sold, and to transfer the title to it. It is distinguished from the accessory or secondary obligation to pay damages for not doing so. 1 Bouv. Inst. n. 702.

A Law Dictionary, Adapted to the Constitution and Laws of the United States. By John Bouvier. Published 1856.
References in periodicals archive ?
Caption: Figure 8: Plastic hinge formation in the web-side frame of model 5MBC: (a) first yield ([delta] = 0.62%); (b) secondary column yield ([delta] = 1.03%); (c) primary beam yield ([delta] = 1.5%); (d) at [delta] = 2%.
For the system with the thick secondary beam, the measured acceleration transmissibility is dominated by the first mode (flexural mode of the primary beam) at 45 Hz, while at a very low amplitude we observed the torsional mode of the primary beam and the flexural mode of the secondary beam, as shown in Figure 18.
The spectrometer role is to suppress by a factor of 100 the background from bremsstrahlung events by detecting the primary beam positrons.
There are very few practices that potentially expose R.T.s and others in the room to the primary beam. This danger could come from holding the patient or improperly collimating and misdirecting a horizontal tube.
The parameter [T.sup.2.sub.c] = [A.sub.c]/[A.sub.p] is the ratio of the cross section area of the coupling beam to that of the primary beam.
Small-angle X-ray scattering (SAXS) data were obtained with a KRM-type diffractometer (Kratky collimation; primary beam intensity control with a monitoring channel; evacuation of the sample chamber) in the range of scattering angles 20 from 3[prime] to 3 deg (copper radiation; nickel filtering of the primary beam; step-by-step scanning regime: recording of scattering radiation with a scintillation counter and digital conversion).
In a SEM, these signals come not only from the primary beam imposing upon the sample, but from other interactions within the sample near the surface.
Regardless of whether the primary beam is activated or not, it should never be pointed at the technologist or other medical personnel.
The laser beam passes through a beamsplitter oriented so that the first reflected beam strikes a monitor detector and the primary beam is transmitted to the test meter.
Small-angle X-ray scattering (SAXS) data were obtained with a KRM-type diffractometer (Kratky collimation; primary beam intensity control with a monitoring channel; evacuation of the sample chamber) in the range of scattering angles 20 from 3[feet] to 5 [degrees] (copper radiation; nickel filtering of the primary beam; step-by-step scanning regime; recording of scattering radiation with a scintillation counter and digital conversion).
It includes contributions from the primary beam and also the radiation back scattered from the tissue below the surface.
The instrumental effects related to the use of a polycapillary x-ray lens as primary beam collimator are here studied and the features observed in the measurements modelled via Monte-Carlo ray-tracing.