The word "preemie" is a shorter way of saying "premature baby." It refers to a baby who is born before their due date or earlier than expected. Full definition
These are great bottles for preemie babies who need to use a bottle instead of or in conjunction with breastfeeding. (abckidsinc.com)
Rental grade pumps are built to be used many, many times per day, ideal for mothers of preemie babies who are not nursing yet, mothers working to increase a low milk supply, or other situations in which pumping many times a day is needed. (oursweetbeginnings.com)
The hats are even available in preemie size, to accommodate premature babies. (checkpregnancy.com)