The Collaborative International Dictionary
Parisyllabic
Parisyllabic \Par`i*syl*lab"ic\, Parisyllabical \Par`i*syl*lab"ic*al\, a. [Pari- + syllabic, -ical: cf. F. parisyllabique.] Having the same number of syllables in all its inflections.
Wiktionary
parisyllabic
a. Having the same number of syllables in all its inflections.