Adjective
Alt. of Parisyllabical
Source: Webster's dictionaryBy the parisyllabic rule, canis should be a masculine i-stem and thus differ from the non-i-stems by having an extra –i– in the plural genitive form: *canium. Source: Internet
Pure i-stems are indicated by the parisyllabic rule or special neuter endings. Source: Internet
The result is that many words that should be i-stems according to the parisyllabic and consonant stem rules actually are not, such as canis or iuvenis. Source: Internet