From the greatest source of knowledge (aka, wikipedia):
"
Doctor, as a title, originates from the Latin word (
gen.:
doctoris) which means
teacher. The word is originally an
agentive noun of the verb
docēre ('to teach')."
The title of Doctor was originally reserved for Ph.D's - everyone else just kinda merged into it. Being a "doctor" is all about having a certain body of knowledge, and, having been told by the faculty at our school who teach both med and dental students that dentists often know much more about the head and neck than your average physician, it makes perfect sense to me that the specialty health professionals - dentists, vets, pharms, Pods, etc - are called "doctors" - they do, after all, earn a Professional Doctorate. Though, my dad (a physician), always jokes with me that med students have four years for "the WHOLE body!" Whereas we have 4 years for "just the mouth!" hahaha.
I also found this interesting from wiki:
"In the
Dutch language the word "dokter" refers to a physician, whereas "doctor" refers to a high academic rank."
"In
German language-speaking countries, the word
Doktor always refers to a research doctorate awardee, and is distinct from
Arzt, a medical practitioner. An
Arzt who holds the
Dr. med. degree is addressed as
Herr Doktor; an
Arzt who does not would simply be
Herr. This rule has been weakened recently, and people (e.g. in Austria) refer to medical practitioners as
Doktor too.[
citation needed]"
"In
France, the title of
Docteur is only used by
physicians,
dentists,
veterinarians and
pharmacists. Confusingly, they do not hold a
doctorate, which is in France only a research doctorate, but a "State Diploma of Doctor". The holders of a doctorate are never addressed as "Doctors", even in an academic environment.[
citation needed]"