One who, or that which, primes
- An elementary textbook for teaching children to read.
- A book that covers the basic elements of a subject.
- A cap or tube containing a small amount of explosive used to detonate the main explosive charge of a firearm or mine.
- An undercoat of paint or size applied to prepare a surface, as for painting.
- Genetics A segment of DNA or RNA that is complementary to a given DNA sequence and that is needed to initiate replication by DNA polymerase.