Catherine also attempted to organize society into well-defined social groups, or estates.

However, this is not the case, and lizards as squamates are part of a well-defined group.

The swift family remains one of the more complicated groups of birds in taxonomic research, but the swiftlet tribe is a rather well-defined group.

The ban on immigration produced unusually well-defined generational groups within the Japanese American community.

Technically, the term applies to well-defined groups of companies that are centered on a trading firm and a bank, like the giant Mitsubishi group.

Instead, it took advantage of having brothel prostitutes, a well-defined, legal and easy-to-reach group, to work with.

First, since any well-defined taxonomic group can trace its origin to a single common ancestor, an evolutionary tree must have a unique basal trunk.

Pfizer researchers spent years trying to find some well-defined group of women for whom increased pelvic blood flow and desire could be linked.

Mr. Weisberg gives him a small, well-defined, coed group of friends and observes the group's dynamics knowingly.

Today the surviving tumuli appear clustered in well-defined and dense groups.