segment

noun

• 1each of the parts into which something is or may be divided.
• a portion of time allocated to a particular broadcast item on radio or television.
• a separate broadcast item, typically one of a number that make up a particular program.
• Phonetics the smallest distinct part of a spoken utterance, in particular the vowels and consonants as opposed to stress and intonation.
• Zoology each of the series of similar anatomical units of which the body and appendages of some animals are composed, such as the visible rings of an earthworm’s body.

• 2 Geometry a part of a figure cut off by a line or plane intersecting it, in particular.
• the part of a circle enclosed between an arc and a chord.
• the part of a line included between two points.
• the part of a sphere cut off by any plane not passing through the center.

verb

• divide (something) into separate parts or sections:the unemployed are segmented into two groups
• [no object] divide into separate parts or sections:the market is beginning to segment into a number of well-defined categories
• [no object] Embryology (of a cell) undergo cleavage; divide into many cells.