1. A small container, such as a bottle, having a narrow neck and usually a cap, especially:
a. A flat, relatively thin container for liquor.
b. A container or case for carrying gunpowder or shot.
c. A vial or round long-necked vessel for laboratory use.
2. A frame for holding a sand mold in a foundry.
[Middle English, cask, keg, from Old French flasque, from Late Latin flascō, of Germanic origin.]
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2020 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.