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architect's scale[′är·kə‚teks ‚skāl]
A rule with a scale on it so chosen that by placing the rule's edge on a reduced-scale drawing the scale of the drawing (say, in inches) may be converted directly into the dimensions of the object (say, in feet).
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
A ruler that uses a series of small measuring units, each representing one foot. This provides an accurate scaled-down version of the actual measurement on the job.
Illustrated Dictionary of Architecture Copyright © 2012, 2002, 1998 by The McGraw-Hill Companies, Inc. All rights reserved
A scale having graduations along its edges so that scale drawings can be measured directly in feet (or meters); often triangular in shape.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.