Classes you need to take to become a dental hygienist. An associateâs degree in dental hygiene, which takes two years, is required to start practice. High school students should focus on core courses, including biology, chemistry, and math.
colonisation, settlement. 1  establishment, constitution, formation, organisation, organization - the act of forming or establishing something; the constitution of a PTA group last year; it was the establishment of his reputation; he still remembers the organization of the club.
Medical Definition of COLON. : the part of the large intestine that extends from the cecum to the rectum.ADVERTISEMENT.lural cola: a rhythmical unit of an utterance; specifically in Greek or Latin verse: a system or series of from two to not more than six feet having a principal accent and forming part of a line. 2.