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First Ionization Energy: The energy needed to remove an electron from an isolated, neutral atom.

First-Pass Regression: A type of preferred stock that has priority over other preferred issues and common stock when claiming dividends and assets.

First-Mover Advantage: A sometimes insurmountable advantage gained by the first significant company to move into a new market.

First-Generation Teacher: Refers to any teacher of Pilates who learned the Method directly under Joseph Pilates. Some of the most notable include Kathy Grant, Carola Trier, Ron Fletcher, Eve Gentry, Romana Kryzanowsk . . . View Full Definition

Free Energy: Energy that is actually available to do useful work. A decrease in free energy accompanies any spontaneous process. Free energy does not change for systems that are at equilibrium.

Gibbs Free Energy: A thermodynamic property devised by Josiah Willard Gibbs in 1876 to predict whether a process will occur spontaneously at constant pressure and temperature. Gibbs free energy G is defined as . . . View Full Definition

Home Energy Rating System (HERS): A standardized system for rating the energy efficiency of residential buildings.

Helmholtz Free Energy: A thermodynamic property that can be used to predict whether a process will occur spontaneously at constant volume and temperature. Helmholtz free energy A is defined as A = U - TS where U, . . . View Full Definition

Gibbs Free Energy Of Formation: The change in Gibbs free energy that accompanies the formation of one mole of a compound from its elements in their most stable form.

First Stage Surgery: This refers to the preparatory stage for an implant procedure. In the case of the subperio-- steal implant, it refers to the surgical bone impression and bone bite, which is done in order to . . . View Full Definition