Definitions

1. adjective

relating to or measuring the depth of the sea or any other body of water at equal intervals; isobathic lines are drawn on charts to represent these depths.

“The oceanographer studied the isobathic lines on the map to better understand the seafloor topography.”

2. noun

a line on a chart or map representing equal depths at sea or in another body of water.

“The isobathic lines on the nautical chart helped the sailors navigate safely.”