subdiscipline

Noun

 * 1) A field of study or work that is related to one aspect, but not the whole, of a broader field of study or work.
 * Social psychology is a subdiscipline of psychology.
 * Phonology is a subdiscipline of linguistics.

Translations

 * Chinese:
 * Mandarin: 分支學科,
 * Dutch:
 * Finnish: alatiede
 * Irish: fodhisciplín
 * Russian: