from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A bound morpheme within a complex word which is a fossil and whose meaning is opaque to the present speakers of the language. May refer narrowly to morphemes which occur in a single word, or more broadly to fossilized morphemes generally.
From the cran- of cranberry as an archetype. cran- is from Kraan ("crane"), but is now a bound morpheme, hence an example of a cranberry morpheme. (Wiktionary)