Heliacal is a word that means related to or near the sun.

The Greek word helios (He lee ose) means ‘sun,’ is a catch-all term that can mean regarding or related to the sun, or it can mean near the sun. Here’s an example of the former:

When hanging around people who do a lot of tanning, you’ll have to get used to a lot of helical conversation. At times it seems those people can’t talk about anything except the sun.