macdonaldite

noun1

1. •
   An orthorhombic-dipyramidal mineral containing barium, calcium, hydrogen, oxygen, and silicon.

   • It is typically a vein-forming mineral associated with macdonaldite, opal, and witherite. — 2012

adjective1

1. •
   Characteristic of MacDonaldism.

   • It is not possible to improve the policy of MacDonald by mosaic corrections. If centrism comes to power, it will inevitably carry on a MacDonaldite, in other words a capitalist, policy. — 2013

noun1

1. •
   Someone who was loyal to Ramsay MacDonald, especially after he split from the Labour Party in 1931.

   • He had been, as she says, 'a great MacDonaldite.' — 1986