| a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question. |
| an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle. |
Gibbs function (ɡɪbz) ![]() | |
| —n | |
| Compare Helmholtz function G, F, Gibbs free energy, Also called: free enthalpy a thermodynamic property of a system equal to the difference between its enthalpy and the product of its temperature and its entropy. It is usually measured in joules | |
| [C19: named after Josiah Willard Gibbs (1839--1903), US physicist and mathematician] | |