Dictionary
mass' mar"ket pa'perback
a relatively inexpensive paperbound book, typically measuring about 4½ × 7 in. (11 × 18 cm), that is distributed on newsstands, in supermarkets, etc., as well as in bookstores.
Also,mass'market pa'perback.Cf.
trade paperback. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.