What is the name of the Vulcan hand gesture used as a greeting in "Star Trek"?

The Vulcan hand gesture used as a greeting in "Star Trek" is called the Vulcan salute. It is made by raising the palm forward, extending the thumb, and separating the middle and ring fingers.

The salute was created for the original television series and first appeared in the 1967 episode "Amok Time". Leonard Nimoy, who played the half-Vulcan officer Spock, helped devise the gesture. He later explained that its form was inspired by the hand position used in the Jewish priestly blessing he had seen as a child.

The salute is commonly accompanied by the phrase "live long and prosper", written for the episode by science-fiction author Theodore Sturgeon. That phrase is related to the gesture but is not its name. "Vulcan handshake", "Spock's wave", and "live long sign" are informal-sounding alternatives, not the canonical term used in the franchise and reference works.