\defineMMLsynonym LeftCeiling  lceil
\defineMMLsynonym LeftFloor    lfloor
\defineMMLsynonym llcorner     dlcorn
\defineMMLsynonym lmoustache   lmoust
\defineMMLsynonym lrcorner     drcorn
\defineMMLsynonym RightCeiling rceil
\defineMMLsynonym RightFloor   rfloor
\defineMMLsynonym rmoustache   rmoust
\defineMMLsynonym ulcorner     ulcorn
\defineMMLsynonym urcorner     urcorn