Wheel spokes, essentially

• Two of three sides of a typical pie slice
• The two sides of Pac-Man's mouth, say
• Diameter halves
• Bicycle spokes, essentially
• Spokes, e.g.
• They meet at a center
• Bones from arm and tibia where odd parts dislodged
• Straight lines from the centre to the surface of a sphere
• Projections from a central point

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Radius \Ra"di*us\ (r[=a]"d[i^]*[u^]s), n.; pl. L. Radii (r[=a]"d[i^]*[imac]); E. Radiuses (r[=a]"d[i^]*[u^]s*[e^]z). [L., a staff, rod, spoke of a wheel, radius, ray. See Ray a divergent line.] (Geom.) A right line drawn or extending from the center of ...