[ahy-suh-bath] /ˈaɪ səˌbæθ/
an imaginary line or one drawn on a map connecting all points of equal depth below the surface of a body of water.
a similar line for indicating the depth below the surface of the earth of an aquifer or the top of the water table.
a line on a map connecting points of equal underwater depth
[ahy-suh-bath-ik] /ˌaɪ səˈbæθ ɪk/ adjective 1. having the same depth. 2. of or relating to an isobath.
[ahy-suh-bath-uh-thurm] /ˌaɪ səˈbæθ əˌθɜrm/ noun 1. a line on a chart or diagram of a body of water, connecting depths having the same temperature.
/ˌaɪsəʊbaɪˈlætərəl/ adjective 1. (botany) (esp of a leaf) capable of being divided into symmetrical halves along two different planes
[ahy-suh-bront] /ˈaɪ səˌbrɒnt/ noun, Meteorology. 1. a line on a weather map or chart connecting various points where a given phase of thunderstorm activity occurred simultaneously.