low-birth-weight baby(n = noun.person) low-birth-weight infant - an infant born weighing less than 5.5 pounds (2500 grams) regardless of gestational age; "a low-birth-weight infant is at risk for developing lack of oxygen during labor"
is a kind of neonate, newborn, newborn baby, newborn infant

babe or baby, baby, baby bed, baby bird, baby blue-eyes, baby boom, baby boomer, baby buggy, baby buster, baby carriage, baby doc, baby doctor, baby farm, baby farmer, baby farming, baby grand, baby grand piano, baby jumper, baby minder, baby oil, baby powder, baby rose, baby shoe, baby sit, baby sitting, baby talk, baby tears, baby tooth, blue baby, bush baby, have a baby, kern baby, low-birth-weight infant, newborn baby, premature baby, preterm baby, test-tube baby, war baby