CL Architectural Abbreviation

Closure

See macroeconomic closure.

Centerline

The longitudinal vertical plane of a vessel. A horizontal foreandaft reference line for athwartship ship measurements, dividing the vessel into two symmetrical halves.

Classic

An environment within Mac OS X that allows a user to run legacy software. Classic emulates the earlier Macintosh operating system chosen by the user and pro-vides support for programs that aren’t compatible with Mac OS X architecture.

Channel

Narrow arm of sea between two land areas. Deepest part of a body of water, and through which main current flows. Longitudinal hollow or cavity. Flat projection from side of a ship to give spread to rigging (usually called 'chains'). Standard rolled steel section in form of three sides of a rectangle

Classification

The separation of ores into fractions according to size and specific gravity, generally in accordance with Stokes' law of sedimentation.or Separation of a metal powder into fractions according to particle size.or The determination that official information requires, in the interests of national security, a specific degree of protection against unauthorized disclosure, coupled with a designation signifying that such a determination has been made. also security classification.

Cleaxance

Closet

Closing

Clearance

 Authorization given by ATC to proceed as requested or instructed (for example “Cleared for take-off”, “Cleared for visual approach”, “Cleared to land”) or Minimum distance from the extremity of a crane to the nearest obstruction.  Or The gap between two mating parts or the space provided between the relief of a cutting tool and the surface being cut. or The control and positioning of plant equipment for providing protection for personnel and equipment during work on plant devices.