specialisation

Noun

• the special line of work you have adopted as your career
  • his specialization is gastroenterology
    

• the act of specializing; making something suitable for a special purpose

• (biology) the structural adaptation of some body part for a particular function
  • cell differentiation in the developing embryo
    

Related words

• Synonyms: 
  specialization , specialty , speciality , specialism , differentiation