What is the Latin word for segment?

The usual Latin words for “segment” are sēgmentum, pars, portiō. The right choice depends on the sense; see the distinctions below.

English → Latin

“segment” in Latin

sēgmentumcutting; cut; slice; piece; segment; strip; zone (of the earth); strips of tinsel sewn around the bottom of a dress parsa part, portion, piece, share; pars ... pars ..., some ... others ...; a party, fraction, side portiōshare, part, portion; relation, proportion

The English word segment itself goes back to Latin secō, through segmentum.

Riddle & Arnold A Copious and Critical English–Latin Lexicon, 1864

segment

Part of a circle, *segmentum (technical term; not in this sense in Pliny).

A part, portion, segmentum: pars: portio

Quick answer

What is the Latin word for segment?: The usual Latin words for “segment” are sēgmentum, pars, portiō. The right choice depends on the sense; see the distinctions below.

Entry from J. E. Riddle & T. K. Arnold, A Copious and Critical English–Latin Lexicon (rev. C. Anthon, New York: Harper, 1864), digitised by Fergus J. P. Walsh, CC BY-SA 4.0; Latin markup adapted by latindictionary.co.