What is the origin of 'sleep tight'?
Read moreOne of the mysteries of the English language finally explained.
Any of various instruments for measuring angles and heights; specifically (a) a nonius quadrant (now historical and rare); (b) a device in the form of an adjustable parallelogram, for measuring the angle of inclination of a slope.
Late 16th century; earliest use found in William Barlow. From panto- + -meter.