We don't have synonyms for cryptozoic yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are cryptologic, cryptozoa and cryptozoite.
(n) :
(archaic, geology) An eon or other time period before the Cambrian, when the fossils of hard-shelled animals first appeared in the geological record.
(adj) :
(chiefly soil science, of an organism) Hidden (especially in the soil); not easily visible.
(adj) :
(zoology) Living in a cavity or small cave.
(n) :
(archaic, geology) An eon or other time period before the Cambrian, when the fossils of hard-shelled animals first appeared in the geological record.
(adj) :
(chiefly soil science, of an organism) Hidden (especially in the soil); not easily visible.
(adj) :
(zoology) Living in a cavity or small cave.