terra incognita
- an unknown land; unexplored territory
- an unknown or unexplored field of knowledge
See terra incognita in American Heritage Dictionary 4
(ĭnˌkŏg-nēˈtə, -kŏgˈnĭ-tə)
noun pl. terrae in·cog·ni·tae (ĭnˌkŏg-nēˈtē, -kŏgˈnĭ-tēˌ) - An unknown land; an unexplored region: “a vast and virtually final terra incognita left to terrestrial explorers” (David F. Salisbury).
- A new or unexplored field of knowledge.
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