major axis

noun 0.757

semidiameter

noun 0.709

semiaxis

noun 0.653

semicircle

noun 0.582

apsis

noun 0.561

radius vector

noun 0.527

major diameter

noun 0.527

semimetric

noun 0.527

radical axis

noun 0.521

semi

noun 0.518

minor diameter

noun 0.518

minor planet

noun 0.517

aphelion

noun 0.512

radius

noun 0.507

periapsis

noun 0.504

diameter

noun 0.503

second of arc

noun 0.502

ecliptic

noun 0.501