isobath

American  

[ahy-suh-bath] / ˈaɪ səˌbæθ /

noun

1. an imaginary line or one drawn on a map connecting all points of equal depth below the surface of a body of water.

2. a similar line for indicating the depth below the surface of the earth of an aquifer or the top of the water table.

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isobath British  

/ ˈaɪsəʊˌbæθ /

noun

1. a line on a map connecting points of equal underwater depth

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Other Word Forms

• isobathic
  adjective

Etymology

Origin of isobath

First recorded in 1885–90, isobath is from the Greek word isobathḗs of equal depth. See iso-, batho-