Definition

Noun: A line on a map or chart connecting points that have an equal value of a specific, measurable quantity, such as temperature, pressure, or elevation. It is a general term for any contour line representing a constant value of a variable.

Usage

The word "isarithm" is a technical term used primarily in cartography, meteorology, and physical geography. It is the standard, formal term for this type of line. The specific name of the line changes based on the variable being measured (e.g., isotherm for temperature, isobar for pressure), but "isarithm" is the overarching category.

Examples

• Noun:
  • The meteorologist analyzed the map, paying close attention to the isarithm indicating atmospheric pressure.
  • To understand the terrain, one must first learn to read the isarithms that show elevation.

Advanced Usage

• "Isopleth": This is a synonym for "isarithm," often used interchangeably in scientific contexts. It specifically refers to a line connecting points of equal value on a diagram representing a function of two variables.
  • The population density map used isopleths to show regions of similar demographic concentration.

Variants and Related Words

• Isotherm (n): An isarithm connecting points of equal temperature.
• Isobar (n): An isarithm connecting points of equal atmospheric pressure.
• Contour line (n): A specific type of isarithm used in topography to connect points of equal elevation above a given level, such as sea level.
• Isoline (n): Another general synonym for isarithm.

Synonyms

• Isopleth
• Isoline
• Contour line (when referring to elevation)

Notes on Meaning

While "isarithm" is the precise generic term, in many practical contexts, especially topography, the more common term "contour line" is used. However, "contour line" technically refers only to lines of constant elevation, whereas "isarithm" can apply to any continuous variable.

Noun

1. a line drawn on a map connecting points having the same numerical value of some variable