angelology

[eyn-juh-lol-uh-jee] /ˌeɪn dʒəˈlɒl ə dʒi/
noun
1.
a doctrine or theory concerning angels.
Origin
1745-55; angel + -o- + -logy
British Dictionary definitions for angelology

angelology

/ˌeɪndʒəˈlɒlədʒɪ/
noun
1.
a doctrine or theory treating of angels