Definition of palaeocrystic in English:
palaeocrystic
(also paleocrystic)
adjective ˌpalɪəʊˈkrɪstɪkˌpeɪlɪəʊˈkrɪstɪk
Designating or consisting of old polar ice.
Origin
Late 19th century; earliest use found in Nature: a weekly journal of science. From palaeo- + ancient Greek κρυστ- + -ic.