Answer: matrass

AnswerCrossword Clue
MATRASSChemist's tube.
MATRASSChemical glass tube, closed at one end.
MATRASSGlass tube for blowpipe tests.
MATRASSGlass flask for distilling.
MATRASSDistilling flask
MATRASSDistiller's glass vessel, once
matrassa long-necked glass vessel, also MATTRASS
matrassrounded, long-necked glass container, formerly used for distilling and dissolving substances