Mace
Mace (Weapon)
A heavy medieval war club with a spiked or flanged metal head, used to crush armour. Note that real maces are illegal in NSW. The point of it was to emulate a club, but with more weight and, optionally, the sharp edges of the spikes or flanges for concentrating force. Both infantry and cavalry used them -- the horseman's mace tended to be shorter in the shaft, for easier wielding; the footman's longer for added power (albeit at the expense of speed).
Maces are believed by some to be primarily for incapacitating opponents. This was particularly useful in an age where ransoms could greatly enrich a person.
SCA Mace
Maces often have a foam head with rattan splints attached to the outside. This is then taped over and is attached to a relatively short handle(haft). A mace is considered a mass weapon.
Mace (Spice)
Mace is an aromatic spice that originally came from East Indonesia. Dried and leathery, mace has a very similar flavour to nutmeg, which isn't surprising. They're both sourced from from the same plant - nutmeg is the kernel of the fruit, mace is the lining that separates the kernel from the pulp.
