or‧tho‧don‧tist /ˌɔːθəˈdɒntəst, ˌɔːθəˈdɒntɪst $ ˌɔːrθəˈdɑːn-/ noun [countable]
a dentist whose job is to help teeth to grow straight when they have not been growing correctly

[TahlilGaran] Dictionary of Contemporary English ▲

dentist someone whose job is to treat people's teeth:
I've made an appointment with the dentist.
She always dreaded a visit to the dentist.
oral surgeon a dentist who has special training to operate on people's teeth
orthodontist a dentist who makes teeth straight when they have not been growing correctly
dental hygienist/hygienist someone who is specially trained to help a dentist by cleaning teeth and giving advice about how to keep teeth healthy:
Ask your dental hygienist for advice on using floss.
dental practitioner formal a dentist

[TahlilGaran] English Thesaurus ▲