The meaning of “χείρ”

“Why do thy disciples transgress the tradition of the elders? for they wash not their hands when they eat bread.”

“And when Peter was come to himself, he said, Now I know of a surety, that the Lord hath sent his angel, and hath delivered me out of the hand of Herod, and from all the expectation of the people of the Jews.”

“Ye see how large a letter I have written unto you with mine own hand.”

“The salutation of Paul with mine own hand, which is the token in every epistle: so I write.”

“Of the doctrine of baptisms, and of laying on of hands, and of resurrection of the dead, and of eternal judgment.”