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| a scrap or morsel of food left at a meal. |
| an extraordinary or unusual thing, person, or event; an exceptional example or instance. |
| di-1 | |
| —prefix | |
| 1. | twice; two; double: dicotyledon |
| 2. | a. containing two specified atoms or groups of atoms: dimethyl ether; carbon dioxide |
| b. a nontechnical equivalent of bi- | |
| [via Latin from Greek, from dis twice, double, related to duo two. Compare | |
| di-2 | |
| —combining form | |
| variant of dia- : diopter | |
| dia- or di- | |
| —prefix | |
| 1. | through, throughout, or during: diachronic |
| 2. | across: diactinic |
| 3. | apart: diacritic |
| 4. | (in botany) at right angles: diatropism |
| 5. | in opposite or different directions: diamagnetism |
| [from Greek dia through, between, across, by] | |
| di- or di- | |
| —prefix | |
| [from Greek dia through, between, across, by] | |
di- pref.
Two; twice; double: dichromatic.
Containing two atoms, radicals, or groups: diiodide.
| di-
A prefix that means "two," "twice," or "double." It is used commonly in chemistry, as in dioxide, a compound having two oxygen atoms. |