copper sulphate

(surveying) A single straight rod or staff, pointed and iron-shod at the bottom, for penetrating the ground, and having a socket joint at the top, used, instead of a tripod, for supporting a compass.

A short jacket reaching the hips, once part of military uniforms. / The jacket of a shell suit.

plural of jack-a-napes

plural of jack-a-lantern

In brewing and malt vinegar manufacture, a cistern which receives the wort.

(knitting machines) A thin iron plate operated by the jack to depress the loop of thread between two needles.

(architecture) Any timber, such as a rafter, rib, or studding, which, being intercepted, is shorter than the others.

A pea coat.

(informal) A person who vocalizes quietly, in a whispering manner, or, ironically, one who is loud and outspoken.