sem·i·nal 
/ˈsɛmənl̟/ adjective
/ˈsɛmənl̟/ adjective 1 formal : having a strong influence on ideas, works, events, etc., that come later : very important and influential
▪ a seminal book/work/writer 2 always used before a noun, medical : of or containing semen
▪ seminal fluid ▪ the seminal duct
▪ a seminal book/work/writer
▪ seminal fluid ▪ the seminal duct
