• noun the point from which change can be measured
  • noun a line which defines the size and layout of a page in an application
  • noun the horizontal line along which characters are printed or displayed
  • In interferometry, the distance between the farthest-separated points at which data is collected
  • A line which serves as the basis for measurement, calculation, or location. It is usually represented graphically as a horizontal line.
  • In displays, such as that of oscilloscopes and radars, the line which represents the reference level in the absence of other signals.
  • The average or reference signal level from which a pulse departs, and to which it returns.
  • In navigation, a line which joins two stations, such as the A and B stations within the loran radio navigation system.
  • acronym BL

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