perambulator

noun3

1. •
   One who perambulates.
2. •
   (UK, old-fashioned) A baby carriage.

   • The reapers were slowly trooping back to their work. The nurse-girl slapped one of her charges and then began to push the perambulator up the hill. — 1913
3. •
   A surveyor's instrument for measuring distances, consisting of a wheel that rolls over the ground, along with a clockwork apparatus and a dial plate upon which the distance travelled is shown by an index.