"Medical" is usually used as an adjective, and therefore in its usual use does not have a plural.
When the phrase "medical test" is shortened to "medical" and used as a noun, the plural is medicals.
The plural uses an apostrophe, as PhD's.
The degree form PhD is correctly abbreviated Ph.D (Doctor of Philosophy). But in modern usage this is often discarded.
However, because either form combines lowercase and uppercase letters, the convention is to use an apostrophe S. (e.g. He has two PhD's in chemistry.) However, this is one of several style forms that is very frequently ignored.
The plural form of the noun 'doctor' is doctors.
The plural form is: The men are doctors.
A group is singular. Thus, a group of doctors is singular.
Drs.
Doctors
Matinees is the plural form.
The plural of donkey is "donkeys". The collective noun is a "drove".
The plural form of female donkeys is jennies.
The plural form for the noun candle is candles.
trapezes
M.D.'s
As you say, it is doctors of philosophy, or in abbreviated form, PhD's.
The word sought may be one of these:m'sieur - (French) the contraction form of monsieur (sir, mister), abbreviated M.messieurs - (French) the plural form of monsieur, abbreviated Mm. or Mssrs.misuser - someone who wrongly or illegally uses property
it is Mister's. If it was abbreviated Mr's.
The possessive form of the plural noun doctors is doctors'.Example: The doctors' offices are in building two.
Italy does not have a plural form.
The plural form of him, her, or it is them. (objective pronouns)
The plural form of beauty is beauties.
The plural form is spelt : subpoenas.
The plural form of radius is radii.
The plural form of quiz is quizzes.
That is the abbreviated form for 'building' .