palaeocrystic
/ˌpalɪəʊˈkrɪstɪk/ /ˌpeɪlɪəʊˈkrɪstɪk/(also paleocrystic)
adjective
Designating or consisting of old polar ice.
- Originally: ice believed to have remained frozen from remote ages; (now) ice more than about ten years old..
Origin
Late 19th century; earliest use found in Nature: a weekly journal of science. From palaeo- + ancient Greek κρυστ- + -ic.