Definition of manchusic:
(n) :
A region of northeastern China comprising the three provinces of Liaoning, Jilin, and Heilongjiang and the northeastern part of Inner Mongolia.
(n) :
(historical) The area traditionally inhabited by the Manchu people and their Jurchen predecessors, in modern China and Russia.
(n) :
(historical) Synonym of Manchukuo: a former puppet state of Imperial Japan.