n. pl. skipjack or skip·jacks
1. A skipjack tuna.
2. Any of various other fishes, such as the bluefish, that habitually leap out of the water.
3. pl. skip·jacks A fishing sloop having a bottom shaped like a flat V and vertical sides.
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.