A person who is not one's biological sibling, but was legally and socially raised as if they were.

The sibling of one's spouse. / The spouse of one's sibling. / The spouse of the sibling of one's spouse. / The sibling of the spouse of one's sibling.

A sibling sharing a single parent, as distinguished from a full sibling or sibling-german, from a step-sibling, or from a sibling-like figure such as a blood sibling.

Alternative form of full-sibling

A particular steroid glycoside.

(vulgar) Motherfucker (generic term of abuse). / (literally, vulgar) One who engages in incestuous sex with their sibling.

plural of sibling fucker

plural of Siberianist

One who studies Siberian regions and cultures.

(mineralogy) A violet form of tourmaline sometimes used as a gemstone.