The caboose is a service car that was ordinarily the last car in a freight train. Most modern trains have no cabooses, also known as brake vans (UK guard's vans). They were originally designed to keep the couplings tight for all the cars between the locomotive and the train's end.
Answer: On this site, the word baby means any child from birth to age 4. Newborn refers to babies under three months of age. Infants are babies from three months to one year old.Toddlers are babies from one year to four years of age.nswer: On this site, the word baby means any child from birth to age 4. Newborn refers to babies under three months of age. Infants are babies from three months to one year old.
Infant - various definitions. Toddler - older. Explanation: In medicine, an infant is a child under 12 months (at least in the UK). However, in UK schools, the 'infant years' are (or used to be - the system is different now from when I was at school!) the period from ages 4 to 7. The child would then progress to junior school (often within the same school) at age 7. 'Toddler', as far as I know, has no definition in medicine and is colloquially used of a child who is big enough to walk but is still considered a baby - 'toddling' is the kind of unsteady walking associated with young children.