-jē, -ji noun
( -es )
Etymology: New Latin pneumatologia, from pneumat- + -logia -logy
1.
a. : the doctrine or theory of spiritual beings (as the Holy Spirit and spirits between God and man)
b.
(1) : the doctrine of spiritual phenomena
(2) : magical or necromantic lore
2. archaic : a theory of the nature and functions of mind and soul : psychology
3. archaic : the science of air or gases