Repline

1. verb :
Replying line-by-line, generally in an e-mail.

2. noun :
Reply written on a single line, inserted in the body of the message that is being replied to.

Origin: The term was first coined by Victor M. M. van Doorn

1. as a verb :
I'm not gonna go into replining right now because I want to press send.

2. as a noun :
I felt excited and happy to read each of your replines.