try and write a companion piece to mathematical formulation of quantum mechanics that explains it in "layman's terms" (ie, no scary bra-ket notation, etc. Possibly lots of pretty pictures of Fourier decompositions will be necessary ...)
... noun or adjective, Royalist, can have several shades of meaning. At its simplest, it refers to an adherent of a monarch or royal family.
Of the more specific uses ...