Hello everybody,
i believe the word you are searching for is KININIGEN. I read this years ago in a german article about the "The Emerald Tablets of Thoth the Atlantean". This is all i found from the text - i used an online translation:
Citation:
„They lived as a shade in Atlantis, but sometimes they appeared among the people. If blood was sacrificed, they came out to be among the people.
....
They moved among us in the human form, but only for the eye they were like people. They were queue-headed if one removed the shine, but for the person they appeared like every other person. They infiltrated the governments and accepted forms which were usual with the people. By means of your arts they killed the heads of the kingdoms, accepted her forms and ruled over the people. They could be discovered only by magic. Your face could be made only by tones visible.
....
They came out only if her name was called and a blood victim was offered. They accepted the manifestation of the person, but her real appearance was the body of a man or a woman with a queue head.
....
They looked really whole like people, but there was a word which they could not pronounce. This was taught the people by the masters and it became the law which every person who held an office this had to pronounce once per lunar month before the people. If he was not able to do it, he was killed. The word was: KININIGEN.“
I cannot say if this is the correct citation from the original text and I dont give too much about the reptilian stuff. I really think theres a lot of nonsense out there in what you can fall and believe.
Just wanted to help.