What Is Spock's Star Trek Hand Sign Called & What Does It Mean?

Leonard Nimoy, who played Spock on "Star Trek: The Original Series" and elsewhere, was raised in a Jewish household in Boston, Massachusetts, as the child of Ukrainian immigrants. His parents were observant, particularly his father, who brought his son along to High Holiday services at their local Orthodox synagogue. There, Nimoy witnessed a ritual that would go on to inform his Vulcan Salute.

Synagogue services on major holidays include the Priestly Blessing. Members of the priestly class of Kohanim — in the most simple terms, those with last names like Cohen and derivations thereof — bless the congregation by lifting their hands with the split-fingered gesture. The difference is that, in performing the Priestly Blessing, both hands are raised.

Crucially, members of the congregation are instructed to avert their gaze while the Blessing is recited, as the priests are said to be channeling the divine presence. Congregants often cover their faces with a tallis, a ritual shawl worn during prayer. But young Nimoy was much too curious to remain under the veil, so he would peer out at the Kohanim from under his father's tallis.

As noted on the Star Trek website, Nimoy wrote, "There were a group of five or six men facing the congregation and chanting in passionate shouts of a Hebrew benediction ... My dad said, 'Don't look.' ... I peeked. And when I saw the split-fingered gesture of these men ... I was entranced. I learned to do it because it seemed so magical. It was probably 25 years later that I introduced that gesture as a Vulcan greeting in 'Star Trek' and it has resonated with fans around the world ever since. It gives me great pleasure since it is, after all, a blessing."