ogo1
/ˈəʊɡəʊ/English regional (Cornwall )
noun
A cave of natural origin in a shoreside cliff.
Origin
Late 16th century; earliest use found in John Norden (c1547–1625), cartographer. From Cornish ogo (in place names), gogo, cognate with Old Welsh guocof, Welsh ogof, †gogof, cave, cavern, den.
OGO2
noun
Orbiting geophysical observatory.
Origin
1960s; earliest use found in The Saturday Review.