Meaning of SEGMENT in English
( n. )
A part cut off from a figure by a line or plane; especially, that part of a circle contained between a chord and an arc of that circle, or so much of the circle as is cut off by the chord; as, the segment acb in the Illustration.
Webster's Revised Unabridged English Dictionary. Пересмотренный полный словарь английского языка Webster. 2012