The traders opened country stores, and their establishments were Nuclei of settlement.
"The Character and Influence of the Indian Trade in Wisconsin"
Frederick Jackson Turner
These reviews and magazines, and others which sprang up beside them, became the Nuclei about which the wit and scholarship of both parties gathered.
"Brief History of English and American Literature"
Henry A. Beers
In other towns the older settlement of whites has been encircled by a broad band of blacks; in still other cases little settlements or Nuclei of blacks have sprung up amid surrounding whites.
"The Souls of Black Folk"
W. E. B. Du Bois