Webster's Revised Unabridged Dictionary · 1913

Ambulator

Ambulator ({not transcribed}) , noun

1.
One who walks about; a walker.
2.
(a) (Zoology) A beetle of the genus Lamia.
(b)
(Zoology) A genus of birds, or one of this genus.
3.
An instrument for measuring distances; -- called also perambulator. — Knight