3
2-d
"Applies" is a verb. It is the third person singular form of the verb "apply."
something
Osmosis is a special form of diffusion that applies only to water molecules. It involves the movement of water from an area of low solute concentration to an area of high solute concentration through a semi-permeable membrane.
three dimensional
The abbreviation stands for Reverend Father and usually applies to a priest.
Reflected concern with form and order
it applies to
two-dimensionalOn a+ the answer is three-dimensional
The word "Greek" applies to masculine, feminine, and neutral. There is no separate feminine form.
You've neglected to say what form "this form" is. But I'm going out on a limb, with no regard for my personal safety, and guessing that "this form" is the ratio of integers, and the "term" is "irrational number".
It applies while you serve in active duty.