- (nonstandard, proscribed, rare) Misconstructed plural form of .
- For usage examples of this term, see Citations:walrii.
- The plural form *walrii is doubly incorrect. Firstly, walrus derives from Danish, not Latin. Secondly, even if walrus were a second-declension Latin noun, the plural form would be *walri; in the correct plurals radii and gladii, with which *walrii is analogous, the first ‘i’s are part of the words’ stems (radi- and gladi-), and not their case endings — for *walrii to be the plural, *walrius would need to be the singular; moreover, walrus would be very unlikely to be a Latin derivation because Classical Latin does not have the letter ‘w’.