divider

Noun

• a drafting instrument resembling a compass that is used for dividing lines into equal segments or for transferring measurements

• a vertical structure that divides or separates (as a wall divides one room from another)

• a person who separates something into parts or groups

• a taxonomist who classifies organisms into many groups on the basis of relatively minor characteristics

Related words

• Synonyms: 
  partition , splitter