Etymology
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segment (n.)

1560s, in geometry, "plane figure contained by a right angle and a part of a circumference of a circle," from Latin segmentum "a strip or piece cut off, a cutting, strips of colored cloth," from secare "to cut" (from PIE root *sek- "to cut"), with euphonious alteration of -c- to -g- before -m-.

Latin segmentum was used in Medieval Latin as a geometry term, translating Greek tmema. The meaning "segmental portion of anything circular" is from 1640s; the general sense of "a division, section, part cut off or marked as separate from others" is from 1762.

segment (v.)

1859 (implied in segmented), "divide or become divided into segments," in reference to cell division, from segment (n.). Transitive sense, "divide (something) into segments" is from 1872. Related: Segmenting.

updated on April 13, 2022

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Definitions of segment from WordNet
1
segment (v.)
divide into segments;
segment an orange
segment a compound word
Synonyms: section
segment (v.)
divide or split up;
The cells segmented
2
segment (n.)
one of several parts or pieces that fit with others to constitute a whole object;
finished the final segment of the road
Synonyms: section
segment (n.)
one of the parts into which something naturally divides;
a segment of an orange
From wordnet.princeton.edu, not affiliated with etymonline.