radium clock
now rare
noun
A timing device in which beta particles from a radium source charge two electroscopic leaves, which discharge at regular intervals each time they diverge sufficiently to touch two earthed metal plates.
Origin
Early 20th century; earliest use found in Daily Herald (Decatur, Illinois).
- ladykin
- ladykind
- ladyless
- ladylike
- ladylikeness
- lady-love
- Lady Luck
- ladyly
- Lady Macbeth
- Lady Mayor
- Lady Mayoress
- Lady Muck
- ladyness
- lady of the bedchamber
- lady of the night
- lady orchid
- lady orchis
- lady (or man or gentleman) of leisure
- lady pack
- lady palm
- lady paramount
- lady parts
- lady's bedstraw
- lady's companion
- lady's cushion