Rainbow baby?

Brittany • I'm 27 and have a 8 yr old little boy. Hoping for baby #2 in the very near future.
I had a miscarriage on April 1, 2013 and haven't been able to get pregnant since. Now that it is over 3 years later... if I were to get pregnant and make it through the pregnancy to birth... would that baby be considered a rainbow baby? Just curious.