Hypertext Webster Gateway: "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.
Additional Hypertext Webster Gateway Lookup
Gateway by dict@stokkie.net
stock only wrote the gateway and does not have any control over the contents;
see the Webster Gateway FAQ,
and also the Back-end/database links and credits.