Variation between classical and nativized plural
Semantic split, cases of divergence of two related meanings
antennae vs. antennas  
  
Variation as part of 
changing of what counts as the standard form
singular plural
millennium millennia vs. millenniums
millennia memoranda vs. memorandums
markedness reversal, i.e. change of what counts as the basic form
singular plural criterion criteria
 
 Last modified 20 Aug 13