Other forms: perambulators
A perambulator is an old-fashioned word for a baby carriage. You might see parents pushing perambulators through the park.
The word perambulator isn't often used today — in Britain, people are more likely to call it a "pram," while in the U.S. these wheeled contraptions used for transporting babies are more commonly known as "strollers." An older meaning, and one still used today in a joking way, is "person who strolls around," or perambulates, from a root meaning "walk around," which is related to amble.