1. One, such as a dog, that growls.
2. A small iceberg.
3. Electricity An electromagnetic device with two poles, used for magnetizing, demagnetizing, and finding short-circuited coils.
4. A container used for carrying draft beer, especially a half-gallon or gallon glass jug with a gasket or screw cap.
[Sense 4, from the sound made by carbon dioxide escaping from under the lids of metal pails in which beer was carried in the past .]
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2018 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.