Слово встречается в следующем контексте:

By some henidical process - henidical, by the way is a favorite word of mine which nobody understands - by some henidical process you persuade yourself... [Jack London, Martin Eden]

It is their ignorance, of course, that makes them believe such rot - their ignorance, which is nothing more nor less than the henidical mental process described by Weininger. [Jack London, Martin Eden]

Заранее спасибо.

Гугление по "генидам" Вейнингера проясняет суть вопроса (http://www.theabsolute.net/ottow/henid.html).
Генида - форма ощущения низших существ. Неуловимая, подсознательная.