genus

noun

1. 1

   A rank in the classification of organisms, below family and above species; a taxon at that rank.

   “All magnolias belong to the genus Magnolia.”

2. 2

   A group with common attributes.

3. 3

   A natural number representing any of several related measures of the complexity of a given manifold or graph.

4. 4

   Within a definition, a broader category of the defined concept.