A cyclograph (also known as an arcograph) is an instrument for drawing arcs of large diameter circles whose centres are inconveniently or inaccessibly located, one version of which was invented by Scottish architect and mathematician Peter Nicholson. In his autobiography, published in 1904, polymath Herbert Spencer eloquently describes his own nea...
instrument for describing arcs of circles without compasses
• (n.) See Arcograph.
Cy'clo·graph noun [ Cyclo- + -graph .] See Arcograph .