wad

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wad

1
a small mass or ball of fibrous or soft material, such as cotton wool, used esp for packing or stuffing

wad

2
a soft dark earthy amorphous material consisting of decomposed manganese minerals: occurs in damp marshy areas
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005

wad

[wäd]
(mineralogy)
A massive, generally soft, amorphous, earthy, dark-brown or black mineral composed principally of manganese oxides with some other minerals, and formed by decomposition of manganese minerals. Also known as black ocher; bog manganese; earthy manganese.
(ordnance)
A felt or cardboard pad used to secure the propellant in place in cartridges. Also known as wadding.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.