D defs.my
Entry 2 senses Webster, 1913

Specialization

/spĕshˌ-əl-əz-āsh'-ən/ · Spe·cial·i·za·tion · IPA /[ˌspɛʃəlɪˈzeɪ̯ʃn̩]/
01 n. The act of specializing, or the state of being spezialized.
  1. 1.
    The act of specializing, or the state of being spezialized.
  2. 2.
    The setting apart of a particular organ for the performance of a particular function.(Biol.)