1) Distilling flask 2) Glass flask for distilling 3) Laboratory equipment 
A matrass (mod. Latin matracium) is a glass vessel with a round or oval body and a long narrow neck, used in chemistry as a digester or distiller. The Florence flask of commerce is frequently used for this purpose. The word is possibly identical with an old name matrass (Fr. materas, matelas) for the bolt or quarrel of a cross-bow. If so, some ide...
long-necked chemical flask
• (n.) A round-bottomed glass flask having a long neck; a bolthead.
Ma·trass' noun [ French matras ; perhaps so called from its long narrow neck; confer Old French matras large arrow, Latin materis , mataris , matara , a Celtic javelin, pike; of Celtic origin.] (Chemistry) A round- bottomed glass flask having a long neck; a b...
Type: Term Pronunciation: mat′răs Definitions: 1. A long-necked glass vessel used for heating dry substances in chemical manipulations.