| continuum | (noun) a continuous nonspatial whole or extent or succession in which no part or portion is distinct or distinguishable from adjacent parts | - |
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| menstruum | (noun) the monthly discharge of blood from the uterus of nonpregnant women from puberty to menopause | Synonyms: catamenia, flow, menses, menstruation, period |
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| (noun) (archaic) a solvent | - |
| residuum | (noun) something left after other parts have been taken away | Synonyms: balance, remainder, residual, residue, rest |
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| vacuum | (noun) an electrical home appliance that cleans by suction | Synonyms: vacuum cleaner |
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| (noun) a region that is devoid of matter | Synonyms: vacuity |
| (noun) an empty area or space | Synonyms: emptiness, vacancy, void |
| (noun) the absence of matter | Synonyms: vacuity |
| (verb) clean with a vacuum cleaner | Synonyms: hoover, vacuum-clean |