a practice or rehearsal; trial run
- Dummy variable
noun 1. a variable appearing in a mathematical expression that can be replaced by any arbitrary variable, not occurring in the expression, without affecting the value of the whole
[doo-mont, dyoo-] /ˈdu mɒnt, ˈdyu-/ noun 1. a city in NE New Jersey.
[doo-mawr-tee-uh-rahyt, dyoo-] /duˈmɔr ti əˌraɪt, dyu-/ noun 1. a mineral, aluminum borosilicate. /djuːˈmɔːtɪəˌraɪt/ noun 1. a hard fibrous blue or green mineral consisting of hydrated aluminium borosilicate. Formula: Al7O3BO3(SiO4)3
- Du mont
/ˈdjuːˌmɒnt/ noun 1. Allen Balcom. 1901–65, US inventor and electronics manufacturer. He developed the cathode-ray tube used in television sets and oscilloscopes