Pronunciation: ' ter- ə - ˌ in- ˌ käg- ' n ē -t ə , -in- ' käg-n ə -t ə
Function: noun
Inflected Form: plural ter · rae in · cog · ni · tae \ ' ter- ˌ ī - ˌ in- ˌ käg- ' n ē - ˌ t ī , -in- ' käg-n ə - ˌ t ī \
Etymology: L
Date: 1611
: unknown territory : an unexplored country or field of knowledge