In addition to the comments above, add one more to the table: bocado (com significado de porção, ou seja, cada fração de toda comida a que estivermos nos referindo).
“Awesome food... Every mouthful savoured!
Chew each mouthful 20 to 30 times, until the food attains the consistency of baby food in the mouth.
(Mastigar cada bocada 20 a 30 vezes, até que os alimentos formem uma papa na boca.)
The forums about breastfeeding talk about mouthful, the act of the baby sucking milk. So he/she might use the most of the area that his mouth can "encompass" of the breast as possible, to him it´s a mouthful. If he/she fails, he may get tired and need to be bottle-fed, in some cases.