Noun
One who, or that which, protracts, or causes protraction.
A mathematical instrument for laying down and measuring angles on paper, used in drawing or in plotting. It is of various forms, semicircular, rectangular, or circular.
An instrument formerly used in extracting foreign or offensive matter from a wound.
A muscle which extends an organ or part; -- opposed to retractor.
Source: Webster's dictionaryOur opponent is an alien starship packed with atomic bombs," I said. "We have a protractor. Neal Stephenson
Our opponent is an alien starship packed with atomic bomc,' I said. 'We have a protractor.' Okay, I'll go home and see if I can scrounge up a ruler and a piece of string. Neal Stephenson
Many modern compasses incorporate a baseplate and protractor tool, and are referred to variously as " orienteering ", "baseplate", "map compass" or "protractor" designs. Source: Internet
The cleavage angles can be measured with a contact goniometer, which is similar to a protractor. Source: Internet
Personal equipment Thumb compass and protractor compass The basic equipment required for orienteering is usually listed as a compass and appropriate outdoor clothing. Source: Internet
Rake is measured by placing a protractor flat on the planar surface, with the flat edge horizontal and measuring the angle of the lineation clockwise from horizontal. Source: Internet