About the meaning of "features"

Hello everyone

I’d like to ask about the meaning of “features” in the following context:

The features that became the subject of this book are commonly
called “orbs.” However, I often refer to them using the more verbose
images of Spirit emanations. The reason for using this unconventional
description is based on the conclusions I have drawn from my
research. Knowing what I know now, the word orb simply appears too
generic and too irreverent to me.

I looked “feature” up in the dictionary

dictionary.reference.com/browse/feature

and have to admit that the meaning is somewhat vague to me.

.
If ‘orbs’ = ‘spirit emanations’, then ‘features’ = characters (#1: a prominent or conspicuous part or characteristic).
.

Thank you very much, Mister Micawber.