decay = D = DED

deckle /dek'l/ n.

[from dec- and nybble; the original spelling seems to have been `decle'] Two nickles; 10 bits. Reported among developers for Mattel's GI 1600 (the Intellivision games processor), a chip with 16-bit-wide RAM but 10-bit-wide ROM. See nybble for other such terms.

--The Jargon File version 4.3.1, ed. ESR, autonoded by rescdsk.