Originally having a religious connotation—a ‘book of prime’ (or hours)—the word now covers any book that deals with the elements of a subject. (See also...

An introductory...

Primer can refer to: Primer (molecular biology), a nucleic acid strand (or related molecule) that serves as a starting point for DNA replication Percussion cap, in ballistics, a small charge that explodes when struck with force or heated with...