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| 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. |
| a scrap or morsel of food left at a meal. |
| potential difference | |
| —n | |
| Compare electromotive force U, ΔV, Δφ, pd the difference in electric potential between two points in an electric field; the work that has to be done in transferring unit positive charge from one point to the other, measured in volts | |
| potential difference (pə-těn'shəl) Pronunciation Key
The difference, measured in volts, in electric potential between two points, especially two points in an electric circuit. |