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| a white, crystalline, water-insoluble, powerful high explosive, C3H6N6O6, used chiefly in bombs and shells. |
| (used as a nonsense word by children to express approval or to represent the longest word in English.) |
meridional me·rid·i·o·nal (mə-rĭd'ē-ə-nəl)
adj.
Of or relating to meridians or a meridian.
| meridional (mə-rĭd'ē-ə-nəl) Pronunciation Key
Of or relating to meridians or a meridian. |