interfix

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

• noun linguistics An empty morph inserted between two morphemes in the process of word formation, such as English -o-, -i-.
• noun computing, information retrieval, dated An association link, a device to group multiple words or concepts.
• verb engineering To attach or anchor two or more parts together.
• verb linguistics To insert an interfix between two morphemes.