semigrand

adj

1. (not-comparable)Of a piano: having a size intermediate between grand and baby grand.

   “An upright semi-grand piano near the door, flanked by two palms in pots, executed suddenly all by itself a valse tune with aggressive virtuosity.”

   “Both companies make the upright, grand, semigrand, and baby-grand pianos, and in such styles as colonial, empire, antique, etc.”

2. (not-comparable)Pertaining to a distribution of species that holds the number of particles, pressure, and temperature fixed but allows mole fractions of species within a phase to fluctuate.

   “A cluster algorithm for Monte Carlo simulations in a semigrand ensemble was used.”