A tax, usually ad valorem, charged on the basis of the fair market value of property. The scope of taxable property varies by jurisdiction and it may include personal property in addition to real estate.

Alternative spelling of propeller head

(law) Any property that is movable, that is, not real estate.

plural of propeller head

(aviation) A turboprop engine. / (aviation) An airplane powered by turboprop engines.

Alternative form of out of proportion

(business, management) The benefit (such as profit or convenience) offered by an organisation's product or service.

(of a knot k) That no nontrivial Dehn surgery along k in the 3-sphere yields a simply connected manifold.

(physics) The acceleration felt by an object, as opposed to the coordinate acceleration. For example the acceleration of an object at the surface of the Earth is 9.81 m/s² upwards, but has no coordinate acceleration. The proper acceleration of an object is Lorentz invariant.

plural of propeller shaft