from The Century Dictionary.

  • noun A long straight-necked glass vessel for chemical distillations. Also called matrass and receiver.

from the GNU version of the Collaborative International Dictionary of English.

  • noun (Chem.) A long, straight-necked, glass vessel for chemical distillations; -- called also a matrass or receiver.
  • noun The head of a bolt.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun chemistry A round-bottomed flask with a long neck (used especially for distillation)
  • noun The head of a bolt.


Sorry, no etymologies found.


Help support Wordnik (and make this page ad-free) by adopting the word bolthead.



Log in or sign up to get involved in the conversation. It's quick and easy.