Sibling

Sister redirects here; for the religious titles, please see Brother (title) or Sister (title).

The only thing I regret is not being an only child.Quark

In a family, a sibling was an offspring born from the same parent or parents as another offspring. (DS9: "Family Business") In the case of multiple births, more than one sibling (i.e. twin, triplet, or quadruplet) were born at one time. (DS9: "Vortex", et al.) One who did not have any siblings were referred to as an only child.

Trill symbionts had to move on from their previous hosts' lives, even forgetting any siblings the host may have had. (DS9: "Rejoined")

In 2153, Doctor Phlox asked T'Pol if she had any siblings. This was done as a prelude to soliciting her help with Trip Tucker, who was grieving the loss of his sister Elizabeth in the Xindi incident. (ENT: "The Xindi")

Haliz recruited Kazon to be fighters as soon as they were old enough to protect their younger siblings. (VOY: "Initiations")

As of 2374, the crew of USS Voyager knew little about Annika Hansen, such as whether she had any siblings. (VOY: "The Gift")

Siblings

Brother

The male sibling was known as the brother. (TOS: "What Are Little Girls Made Of?", et al.) In the Ferengi language, the term was translated as "yoba". (DS9: "Little Green Men")

A child who has a brother shared through one parent was known as a half-brother. Spock and Sybok were half-brothers; both were sons of Sarek, but both had different mothers. (Star Trek V: The Final Frontier)

Spock was also the foster brother of Michael Burnham after she became the ward of his parents. (DIS: "Battle at the Binary Stars") Burnham later introduced herself as the sister of Spock during her first meeting with President T'Rina. (DIS: "Unification III")

Sister

The female sibling was known as the sister. (Star Trek II: The Wrath of Khan, et al.) A sister who was not biologically related but rather by marriage was known as a stepsister. (TNG: "Parallels"; DS9: "The Magnificent Ferengi") Ships that were similar to each other were, in keeping with the tradition of referring to a ship as a "she", known as sister ships.

Examples

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