ˌaɪsoʊˈpʊərən, ˌaɪs-

Definitions

1. noun

A geologic formation or stratum that is a surface of equal age, often used to determine the age of a fossil or rock formation.

“The geologists used the isopleuran to estimate the age of the fossil they discovered.”

2. adjective

Relating to or characteristic of an isopleuran.

“The geologist noted the isopleuran characteristics of the rock formation.”