ὀπτασία

Whereupon, O king Agrippa, I was not disobedient unto the heavenly vision:

It is not expedient for me doubtless to glory. I will come to visions and revelations of the Lord.

And when he came out, he could not speak unto them: and they perceived that he had seen a vision in the temple: for he beckoned unto them, and remained speechless.

And when they found not his body, they came, saying, that they had also seen a vision of angels, which said that he was alive.