411 REFERENCE · Wiktionary
A19
Reference material by Wiktionary contributors. This retains its source identity and is not 411 news reporting.
Translingual
Etymology
From being the (A) standard shape (pear-like), and being 19 × 1/8-th inch in diameter of the speherical portion.
Noun
mul noun
mul electrics lighting A standard en lightbulb bulb, the en pear-shaped bulb of 19/8-ths inch in width; the common sized lightbulb.
Coordinate terms
mul E26 <q:common regular bulb size screw base in North America> E27 <q:common regular bulb size screw base in Europe>