Definition for Conjugation
From Biology Forums Dictionary
A type of genetic transfer between bacteria that involves a direct physical interaction between two bacterial cells. In other words, this is when two bacteria directly transfer genetic material while being temporarily joined together by a sex pilus - a "sex" appendage. DNA is usually transferred one-way the “male” use pili to attach to recipient, and pulls the two cells together and a temporary cytoplasmic bridge forms for DNA to transfer the genetic material.