noun (n)

• (mathematics) a mathematical relation such that each element of a given set (the domain of the function) is associated with an element of another set (the range of the function)(noun.linkdef)

  Synonym:
  function, map, mathematical function, single-valued function
  

  source: wordnet30
• (genetics) the process of locating genes on a chromosome(noun.act)

  Synonym:
  chromosome mapping
  

  source: wordnet30