second cousin

noun

1. a child of a first cousin of one’s parent.Compare cousin(def 1).

noun

1. the child of a first cousin of either of one’s parents

Something that is related or similar but not quite the same, as in This beef stew is second cousin to boeuf bourguignon. This expression transfers the literal sense of second cousin—that is, the child of the first cousin of one’s mother or father—a usage dating from the mid-1600s.