from the GNU version of the Collaborative International Dictionary of English
- n. The Japanese warrior gentry or middle class, formerly called samurai; also, any member of this class.
from The Century Dictionary and Cyclopedia
- n. The military or two-sworded men of Japan; the gentry, as distinguished on the one hand from the kuwazokŭ or nobles, and on the other from the heimin or common people.
- n. A member of this class.
Sorry, no etymologies found.
6 The word shizoku is simply the Chinese for samurai.
It is only since the military caste has been abolished, and its name, simply as a body of gentry, changed to shizoku,  that some families have become victims of the superstition through intermarriage with the chonin or mercantile classes, among whom the belief has always been strong.
A Matsue shizoku, going home one night by way of the street called
The city can be definitely divided into three architectural quarters: the district of the merchants and shop-keepers, forming the heart of the settlement, where all the houses are two stories high; the district of the temples, including nearly the whole south-eastern part of the town; and the district or districts of the shizoku (formerly called samurai), comprising a vast number of large, roomy, garden-girt, one-story dwellings.
Izumo, the Rice-God, for obvious reasons, was a highly popular deity; and you can still find in the garden of almost every old shizoku residence in Matsue, a small shrine of Inari Daimyojin, with little stone foxes seated before it.
In the houses of the poorest -- often consisting of but one apartment -- there can be little choice as to rooms; but it is a rule, observed in the dwellings of the middle classes, that the kamidana must not be placed either in the guest room (zashiki) nor in the kitchen; and in shizoku houses its place is usually in one of the smaller family apartments.
The news was brought one evening by some friends, shizoku of Matsue, who had settled in Oki, a young police officer and his wife.
Roshi shirakashi tokyo, adj. rumaki shitogi tsuba torii ryo shizoku Toyama, adj.
17 The Japanese police are nearly all of the samurai class, now called shizoku.