1. That point of a planet or comet's orbit most distant from the sun.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• zphelion,
• sphelion,
• wphelion,
• qphelion,
• aohelion,
• alhelion,
• a-helion,
• a0helion,
• apgelion,
• apbelion,
• aphellion,
• sophenion,
• Aphidien,
• Apollion,
• appesion,
• phelon,
• raphelism,
• pomelion,
• Phelin,
• staphilion

• apollinaire,
• appealing,
• aplin,
• appliance,
• appling,
• apolinar,
• appellant,
• Applin,
• appealingly.

The adjective form of the word "aphelion" is "aphelic".

The plural of the "aphelion" can be the "aphelia".

The plural of the "aphelion" can be the "aphelions".

The singular of the "aphelion" can be the "aphelion".