Hypertext Webster Gateway: "matrass"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Matrass \Ma*trass"\, n. [F. matras; perh. so called from its
long narrow neck; cf. OF. matras large arrow, L. materis,
mataris, matara, a Celtic javelin, pike; of Celtic origin.]
(Chem.)
A round-bottomed glass flask having a long neck; a bolthead.
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Bolthead \Bolt"head`\, n.
1. (Chem.) A long, straight-necked, glass vessel for chemical
distillations; -- called also a {matrass} or receiver.
2. The head of a bolt.
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