launderometerEtymologyFrom a trademark, Launder-Ometer, from launder + -o- + -meter.launderometer means A device with rotating cylinders for measuring the cleanability or colorfastness of cloth in a given liquid. Lexicurio rates it Sui generis — a strength score of 95 out of 100.nounA device with rotating cylinders for measuring the cleanability or colorfastness of cloth in a given liquid.“These test fabrics were washed in launderometers and graded on photometers.”