cryptobiotic Syllabification: (cryp·to·bi·ot·ic)Pronunciation: /ˌkriptəˌbīˈätik/Definition of cryptobiotic adjective Biology 1of, relating to, or capable of cryptobiosis. 2of or denoting primitive organisms of the kind presumed to have existed in earlier geological periods but to have left no trace of their existence. cryptobiotic in other Oxford dictionaries Definition of cryptobiotic in the British & World English dictionary