simplex

 
Pronunciation: /ˈsɪmplɛks/

adjective

technical
  • composed of or characterized by a single part or structure.
  • (of a communication system, computer circuit, etc.) only allowing transmission of signals in one direction at a time.

noun

  • a simple or uncompounded word.

Origin:

late 16th century: from Latin, literally 'single', variant of simplus 'simple'