(n.) A spiritualist.

Charlie McCarthy actor agency agent air brush ambiance ambience ambient amidships ancilla appliance approach arbitrator arc arc light architect art paper atmosphere atoms autecology author automatist avenue average balance banal betwixt and between bien cuit bioecology bionomics broker brush camera lucida camera obscura canvas center central chalk channel charcoal chromogen climate coat coat of paint coating color color filter color gelatin colorant coloring common compromise connection contact contrivance conveyance core course crayon creator creature crown dead-color deputy device dimmer distemper distillate distillation distributor doer done doneness drawing paper drawing pencil drier dull dummy duodecimo dupe dye dyestuff easel ecoclimate ecodeme ecology ecosystem ecstatic eighteenmo element elixir environment equatorial equidistant essence everyday executant executor executrix expedient exterior paint fabric fabricator fair fair to middling fairish fence fixative flat coat flat wash floats flood floodlight floor enamel folio footlights foots front front man gelatin generality gist go-between golden mean ground half measures half-and-half measures halfway halfway measures handmaid handmaiden happy medium heart imperial implement indifferent insipid instrument instrumentality instrumentation interagent interceder intercessor intercurrent interior interior paint interjacent intermediary intermediate intermediate agent intermediation intermediator intermedium internuncio interpleader intervener intervenient intervening interventionist interventor jobber juste-milieu kernel klieg light lackluster lay figure lever liaison light plot lights limelight link long suit maker marquee marrow material matter maulstick mean means meat mechanism medial median mediary mediator mediocre mediocrity mediterranean medium-rare mesial mesne method metier mezzo mid middle middle course middle ground middle point middle position middle state middle way middle-of-the-road middleman middling midland midpoint midships midway midwife milieu minion ministry mise-en-scene mode moderate moderateness moderation modest mouthpiece mover namby-pamby necromancer negotiant negotiator negotiatress negotiatrix neutral neutral ground norm normal nub nuclear octavo octodecimo of a kind of a sort of sorts ombudsman opaque color operant operative operator ordinary organ overcooked overdone oyster paint paintbrush palette palette knife