Perimeter
Pronunciation : Per*im"e*ter
Part of Speech : n.
Etymology : [Gr. p?rim?tre.]
Definition : 1. (Geom.)
Defn: The outer boundary of a body or figure, or the sum of all the sides.
2. An instrument for determining the extent and shape of the field of vision.
Source : Webster's Unabridged Dictionary, 1913