Significat

1. A category in the classification of organisms, ranking below family (Lat. familia) and above species.
2. A category in the classification of organisms, ranking below family (Lat. familia) and above species.
3. A group with common attributes.
4. A natural number representing any of several related measures of the complexity of a given manifold or graph.
5. Within a definition, a broader category of the defined concept.
6. A type of tuning or intonation, used within an Ancient Greek tetrachord.