- the product quality or condition of getting powerful reproductive powers; generation with full virility between various types or events, specif. between hybrids of this first-generation.
- The quality of reproduction easily; fertility; particularly, the production of younger because of the union of people various species or stocks.
- the high quality or condition of getting powerful reproductive abilities; generation with full fertility between different species or events, specif. between hybrids of the first generation.
- the standard of reproduction freely; virility; particularly, the production of youthful because of the union of an individual various types or stocks.