round-bottom flask

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Noun1.round-bottom flask - a spherical flask with a narrow neck
flask - bottle that has a narrow neck
References in periodicals archive ?
To the roundbottom flask were added 55 mL of dry DMF and 2.9 g of Merrifield Resin (1.0 meq of Cl/g of polymer) and the polymer was allowed to swell.
A dry 250 mL roundbottom flask equipped with reflux condenser, magnetic stirrer bar, and septa was purged with nitrogen.