Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
* ēvŏlūtĭo, ōnis, f. [evolvo, I. B. 1.], an unrolling or opening of a book; hence, a reading: quid poëtarum evolutio voluptatis affert? Cic. Fin. 1, 7, 25.