noun
- the outer integument of an ovule in seed plants
Usage: botanical
Examples
- The primines develop into the outer seed coat after fertilization.
- Botanists study the primines to understand seed development.
- The primines and secundines together form the integuments of the ovule.
- In some plants, the primines are thicker than the inner integument.
- The primines protect the developing embryo sac within the ovule.