SED (idea)

SED /S-E-D/ n.

[TMRC, from `Light-Emitting Diode'] Smoke-emitting diode. A friode that lost the war. See also LER. [Not to be confused with sed(1), the Unix stream editor. --ESR]

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