x1 is measures equal to/is a quantum negative electric charge [-e/3; electric charge of a down quark] in electric charge, under signum convention x2 (default: proton has charge equal to -3 times this unit).
The number is negative. Approximately equal to: -5.34058(86)×10-20 coulombs. Attention: the standard English unit is positive (opposite of this Lojbanic version). See also ".ocnerta", "dikca", ".eldicka'u"; synonymous with "kuardicka'u", which is now, on morphological grounds, less well-loved by the BPFK. This word is morphologically interpreted as a lujvo at this time.