I. noun
or sag·gar ˈsagə(r)
( -s )
Etymology: probably alteration of safeguard (I)
1.
a. : a box made of fire clay in which delicate ceramic pieces are placed while being fired either for biscuit or for glaze
b. : the clay of which saggers are made
2. : a box in which cast-iron articles are packed in contact with hematite ore or mill scale to be converted to malleable cast iron in an annealing furnace
II. transitive verb
( -ed/-ing/-s )
: to treat (as stoneware) in a sagger