opisometer

As a noun opisometer

is a device for measuring the length of curved lines, such as on a map.

As an adjective undefined is

lacking a definition or value.

As nouns the difference between terms and opisometer

is that terms is while opisometer is a device for measuring the length of curved lines, such as on a map.

As nouns the difference between opsiometer and opisometer

is that opsiometer is an old instrument for measuring vision and determining the focal length of a lens that can correct an individual's imperfect eyesight while opisometer is a device for measuring the length of curved lines, such as on a map.

Opisometer is a synonym of meilograph.

Meilograph is likely misspelled.

Meilograph has no English definition.

As a noun opisometer is

a device for measuring the length of curved lines, such as on a map.

Curvimeter is a synonym of opisometer.

As nouns the difference between curvimeter and opisometer

is that curvimeter is a device for measuring the length of curves, such as on a map while opisometer is a device for measuring the length of curved lines, such as on a map.

As nouns the difference between line and opisometer

is that line is a path through two or more points (compare ‘segment’); a continuous mark, including as made by a pen; any path, curved or straight while opisometer is a device for measuring the length of curved lines, such as on a map.

As a verb line

is to place (objects) into a line (usually used with "up"); to form into a line; to align.

As an adjective curved

is having a curve or curves.

As a verb curved

is (curve).

As a noun opisometer is

a device for measuring the length of curved lines, such as on a map.

As nouns the difference between device and opisometer

is that device is any piece of equipment made for a particular purpose, especially a mechanical or electrical one while opisometer is a device for measuring the length of curved lines, such as on a map.