By way of armoury and utensils, I took a revolver, a little spirit-lamp and pan, a lantern and some halfpenny candles, a jack-knife and a large leather flask.
Meaning of halfpenny for the defined word.
Grammatically, this word "halfpenny" is an adjective, more specifically, an uncomparable adjective. It's also a noun, more specifically, a countable noun.