Definition of register plate in English:

register plate

noun

  • 1A plate on a barometer marked with a scale of atmospheric pressure and the supposed weather conditions corresponding to different pressures. Now historical.

  • 2An adjustable metal plate, usually in a grate or chimney, which enables the passage of air, heat, or smoke to be regulated. Also (later): an adjustable metal vent in a wall or floor allowing the passage of air from a central heating system.

  • 3Rope-making. A rotating disc with concentric holes through which strands are drawn and twisted in the making of rope or yarn.

Origin

Late 17th century. From register + plate.

Pronunciation

register plate

/ˈrɛdʒɪstə ˌpleɪt/