interlinear
1 of 2adjective
in·ter·lin·ear ˌin-tər-ˈli-nē-ər 
1
: inserted between lines already written or printed
2
: written or printed in different languages or texts in alternate lines
interlinearly adverb
interlinear
2 of 2noun
: a book having interlinear matter
especially : a book in a foreign language with interlinear translation
Word History
Etymology
Adjective
Middle English interliniare, from Medieval Latin interlinearis, from Latin inter- + linea line
First Known Use
Adjective
15th century, in the meaning defined at sense 1
Noun
1850, in the meaning defined above