Emily Dickinson Lexicon

SEG'MENT, n. [Fr. from L. segmentum, from seco, to cut off. We observe here the Latin has seg, for sec, like the It. segare, Sp. segar, and like the Teutonic sagen, zaagen, to saw; properly, a piece cut off.]

1. In geometry, that part of the circle contained between a chord and an arch of that circle, or so much of the circle as is cut off by the chord. Newton.
2. In general, a part cut off or divided; as, the segments of a calyx.