IPA: /ˌkrɪptəʊzəʊˈɒlədʒi/
KK: /ˌkrɪptoʊzoʊˈɑːlədʒi/
The study of animals that are rumored to exist but have not been proven to be real, like Bigfoot or the Loch Ness Monster.
Many enthusiasts of cryptozoology search for evidence of creatures like the Chupacabra.
Cryptozoology → It is formed from "crypto-" (from Greek "kryptos", meaning hidden or secret) and "zoology" (from Greek "zoología", meaning the study of animals). The word refers to the study of animals whose existence is not substantiated by mainstream science, thus focusing on hidden or secret creatures.
Think of 'hidden' ('crypto-') animals being studied ('zoology') — that's what cryptozoology is all about.