adjective: (botany) Relating to, or of the nature of, trees of family Araucariaceae
noun: Any tree of the genus Araucaria.
adjective: Of or pertaining to the cryptic crossword style used by "Araucaria" (John Galbraith Graham); focused on humour and lateral thinking rather than strict grammaticality.
adjective: Alternative letter-case form of araucarian [(botany) Relating to, or of the nature of, trees of family Araucariaceae]