LEXIDESPONTIA

The feeling of profound depression upon discovering that your submission was not, in fact, the ten-thousandth entry into the pseudodictionary. (See decakilonym.) Example: Despite my superb submission, my entry was not selected as the ten-thousandth entry and therein lies the taproot of my lexidespontia. [It was, indeed, a fine entry. (The editor likes lexidespontia. even more.) It just came in about five or ten words early.]