What IS a DWORD/WORD/etc?

What IS a DWORD/WORD/etc?
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bit = ...1 bit...
nybble = 4 bits = 1/2 byte
byte = 8 bits = 2 nybbles
WORD = 2 bytes = 4 nybbles = 16 bits
DWORD = 2 WORDs = 4 bytes = 8 nybbles = 32 bits
QWORD = 2 DWORDs = 4 WORDS = ..... = 64 bits

DWORD stands for Double Word, QWORD for Quad (prefix meaning 4).
I suppose the next would be Oct (prefix meaning 8).
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"It doesn't matter if you're white, or if you're black...the only color that REALLY matters is green"
-Peter Griffin
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// Source: http://www.gamedev.net/topic/80721-what-is-a-dword/
// BaSs_HaXoR