What's the difference between ellipsograph and elliptograph?
Ellipsograph
Definition:
(n.) An instrument for describing ellipses; -- called also trammel.
Example Sentences:
(1) In this investigation the evaluation of caries by clinical inspection, bitewing X-rays and ellipsographic survey (Panelipse R) were contrasted.
(2) The results in 112 volunteers showed that the ellipsographic survey almost doubles the detection of caries but does not achieve the detail of bitewing X-rays.