Manning, I think it is well within NPOV to say in parentheses ("often so-spelled by false analogy to xxx; medical and scientific language uses
superfetation"). I can't think off the top of my head of any exampls other than
phoenix and
Phoebus Apollo to pop in. And to the person who said 'it's in a dictionary therefore it is a correct form', I say:
hmph --
MichaelTinkler, who thinks