Spokes, for example

• Pie cuts, geometrically
• Minute hands, essentially
• Shadows on an equatorial sundial, say
• Ulnae neighbors
• Bicycle spokes, e.g
• Neighbors of ulnae
• Arm bones
• Lines from the center

WordNet Word definitions in WordNet
See radius

Wiktionary Word definitions in Wiktionary
n. (plural of radius English)