'Solid of least resistance' definitions:

Definition of 'Solid of least resistance'

From: GCIDE

Resistance \Re*sist"ance\ (-ans), n. [F. r['e]sistance, LL. resistentia, fr. resistens, -entis, p. pr. See Resist.]
1. The act of resisting; opposition, passive or active. [1913 Webster]
When King Demetrius saw that . . . no resistance was made against him, he sent away all his forces. --1. Macc. xi. 38. [1913 Webster]
2. (Physics) The quality of not yielding to force or external pressure; that power of a body which acts in opposition to the impulse or pressure of another, or which prevents the effect of another power; as, the resistance of the air to a body passing through it; the resistance of a target to projectiles. [1913 Webster]
3. A means or method of resisting; that which resists. [1913 Webster]
Unfold to us some warlike resistance. --Shak. [1913 Webster]
4. (Elec.) A certain hindrance or opposition to the passage of an electrical current or discharge offered by conducting bodies. It bears an inverse relation to the conductivity, -- good conductors having a small resistance, while poor conductors or insulators have a very high resistance. The unit of resistance is the ohm. [1913 Webster]
Resistance box (Elec.), a rheostat consisting of a box or case containing a number of resistance coils of standard values so arranged that they can be combined in various ways to afford more or less resistance.
Resistance coil (Elec.), a coil of wire introduced into an electric circuit to increase the resistance.
Solid of least resistance (Mech.), a solid of such a form as to experience, in moving in a fluid, less resistance than any other solid having the same base, height, and volume. [1913 Webster]