WordNet: great circle

a circular line on the surface of a sphere formed by intersecting it with a plane passing through the center

• hypernym line

• hyponym celestial equator, equinoctial, equinoctial circle, equinoctial line

• hyponym ecliptic

• hyponym equator

• hyponym celestial horizon, horizon

• hyponym hour circle

• hyponym line of longitude, meridian

• hyponym vertical circle

great circle

• (suomi) isoympyrä (synonyymi)

• (suomi) isoympyräreitti (synonyymi)