I. ̷ ̷ˈ ̷ ̷ ̷ ̷ˌtōrē, -tȯr-, -ri noun
( -es )
Etymology: probably from (assumed) New Latin observatorium, from Latin observatus (past participle of observare to observe) + -orium
1. : a building or place given over to or equipped for observation of natural phenomena (as in astronomy, magnetism, meteorology, ornithology) ; also : an institution whose primary purpose is making such observations
2. : a situation, position, or place (as a building or elevated chamber) affording or commanding a wide view : lookout
II. adjective
Etymology: Latin observat us, past participle + English -ory
: relating to observation especially when scientific