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Related to pair of compasses: protractor

TO COMPASS. To imagine; to contrive.
     2. In England, to compass the death of the king is high treason. Bract. 1. 3, c. 2 Britt. c. 8; Mirror, c. 1, s. 4.

References in periodicals archive ?
Since the diameter of the circle is 14 cm, then its radius is 7 cm, so we can use a pair of compasses to construct a circle of radius 7 cm (see Figure 6).
Knight of Pugin's more professional collaborator on the New Palace of Westminster, Sir Charles Barry holds his pair of compasses aloft in his right hand while his elbow rests on a plan of the Victoria Tower on a table (Fig.
This process is locally called 'bringing the brim to the pair of compasses'.
This hardware featured equally alongside the pair of compasses and also the necessary slide-rule, as calculators didn't exist.
"The art of measurement being the foundation of all painting," he wrote, "I propose to give the elements thereof and to explain its principles to young people wishing to educate themselves in their art, so that they may confidently start measuring with a pair of compasses and ruler, thereby recognizing and having before their eyes the genuine truth...." (2).
And what about the word 'centre?' More often than not this word simply means the middle of something although it is also widely used in phrases such as 'town centre' 'medical centre' and 'garden centre.' It was originally a Greek word meaning 'goad' or 'sharp point' and was the word used for the point on a pair of compasses which was placed on a drawing surface as a circle was drawn.