(n): any of the more than 100 known substances (of which 92 occur naturally) that cannot be separated into simpler substances and that singly or in combination constitute all matter
(n): a fluid in the gaseous state having neither independent shape nor volume and being able to expand indefinitely
(n): a unit of inductance in which an induced electromotive force of one volt is produced when the current is varied at the rate of one ampere per second
(n): a measure of the property of an electric circuit by which an electromotive force is induced in it
(n): the constant of proportionality relating the energy of a photon to its frequency; approximately 6.626 x 10^-34 joule-second
(n): the constant value of the ratio of two proportional quantities x and y; usually written y = kx, where k is the factor of proportionality
(n): the 8th letter of the Roman alphabet
(n): the conventional characters of the alphabet used to represent speech
(n): (thermodynamics) a thermodynamic quantity equal to the internal energy of a system plus the product of its volume and pressure
(n): any property used to characterize matter and energy and their interactions
H. Chemical element symbol for Hydrogen.