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159 to 163 of 227 glossary terms
proportional compasses: drawing instrument consisting of two legs each with points at either end; used for transferring dimensions in enlarged or reduced ratio.
proportional dividers: drawing instrument consisting of two legs each with points at either end; used for transferring dimensions in enlarged or reduced ratio.
proportional instrument: unusual instrument used to mechanically perform functions in trigonometry.
protractor: instrument for setting out and measuring degrees.
quadragesima: the 40 days of Lent or the first Sunday in Lent.
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