While America was undergoing an era of good feeling there were many problems lying under the surface. These social ills were attacked many social reformers. This reform movement was led by people who believed that America could do anything if she put her mind to it. One writer called America, The Israel of our time.. Major reform movements existed in the following areas:
mononuclear. adj. 1. (Physiology) (of a cell) having only one nucleus.
View At a Glance. 1  The mononuclear phagocyte system (MPS) is composed of monocytes, macrophages and dendritic cells (DCs) and has crucial roles in maintaining organismal homeostasis. In addition, the diverse activities of the MPS are relevant in inflammation, autoimmunity, infection, cancer and organ transplantation.