plural of REL

Initialism of Russo-European Laika.

plural of blood relative

plural of non-relative

plural of first-degree relative

plural of third-degree relative

plural of second-degree relative

(grammar) A pronoun that introduces a relative clause and refers to an antecedent. Some words that can be used as interrogative pronouns can alternatively be used as relative pronouns: what, which, who, and whom. The other relative pronouns are whoever, whomever, whatever, and that.

(grammar) A relative pronoun used in an adjectival clause.

(relativity) A theory that (neglecting the effects of gravity) reconciles the principle of relativity with the observation that the speed of light is constant in all frames of reference.