Webster's Revised Unabridged Dictionary · 1913

Stool

Stool , noun

[Latin stolo. See Stolon.]

(Horticulture) A plant from which layers are propagated by bending its branches into the soil. — P. Henderson

Stool , intransitive verb

(Agriculture) To ramify; to tiller, as grain; to shoot out suckers. — R. D. Blackmore

Stool , noun

[Anglo-Saxon stōl a seat; akin to OFries. & Old Saxon stōl, Dutch stoel, German stuhl, Old High German stuol, Icelandic stōll, Swedish & Danish stol, Gothic stōls, Lithuanian stalas a table, Russ. stol'; from the root of English stand. r163. See Stand, and compare Fauteuil.]

1.
A single seat with three or four legs and without a back, made in various forms for various uses.
2.
A seat used in evacuating the bowels; hence, an evacuation; a discharge from the bowels.
3.
A stool pigeon, or decoy bird. [United States]
4.
(Nautical) A small channel on the side of a vessel, for the dead-eyes of the backstays. — Totten
5.
A bishop's seat or see; a bishop-stool. — J. P. Peters
6.
A bench or form for resting the feet or the knees; a footstool; as, a kneeling stool.
7.
Material, such as oyster shells, spread on the sea bottom for oyster spat to adhere to. [Local, United States]
Collocations (3)
Stool of a window or Window stool (Architecture) , the flat piece upon which the window shuts down, and which corresponds to the sill of a door; in the United States, the narrow shelf fitted on the inside against the actual sill upon which the sash descends. This is called a window seat when broad and low enough to be used as a seat.
Stool of repentance , the cuttystool. [Scottish]
Stool pigeon , a pigeon used as a decoy to draw others within a net; hence, a person used as a decoy for others.