INFIDELITY n.
Want of faith or belief in some religious system; especially, a want of faith in, or disbelief of, the inspiration of the Scriptures, of the divine origin of Christianity. There is, indeed, no doubt but that vanity is one of the principal causes of infidelity. V. Knox.
ISOMETRIC; ISOMETRICAL a.
Noting, or conforming to, that system of crystallization in which the three axes are of equal length and at right angles to each other; monometric; regular; cubic. Cf. Crystallization. Isometric lines (Thermodynamics), lines representing in a diagram the relations of pressure and temperature in a gas, when the volume r…