quadro-negro

== Portuguese == === Noun === quadro-negro m (plural quadros-negros) blackboard (a surface that can be written upon with chalk) Synonyms: lousa, quadro, quadro de giz === Further reading === “quadro-negro”, in Dicionário Aulete Digital (in Portuguese), Rio de Janeiro: Lexikon Editora Digital, 2008–2026 “quadro-negro”, in Dicionário Priberam da Língua Portuguesa (in Portuguese), Lisbon: Priberam, 2008–2026