Southern blot analysis
A technique for identifying specific sequences of DNA in which DNA fragments are separated by electrophoresis, transferred to a nylon or nitrocellulose membrane, and identified with a suitable probe, such as a fragment of single-stranded DNA.
[After Edwin Mallor Southern (born 1938), British biochemist.]
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.