n.
Pronunciation: ˌ ek-s ō -b ī - ' ä-l ə -j ē
Function: noun
Date: 1960
: a branch of biology concerned with the search for life outside the earth and with the effects of extraterrestrial environments on living organisms
– exo · bi · o · log · i · cal \ - ˌ b ī - ə - ' lä-ji-k ə l \ adjective
– exo · bi · ol · o · gist \ -b ī - ' ä-l ə -jist \ noun