oil of rhodium
now chiefly historical and rare
noun
An oil distilled from rhodium wood; (in later use also) a mixture of oils used as a substitute for this.
Origin
Mid 17th century; earliest use found in Nicholas Culpeper (1616–1654), physician and astrologer.
- sleeping draught
- sleeping partner
- sleeping pill
- sleeping policeman
- sleeping sickness
- sleep-learning
- sleepless
- sleeplessly
- sleeplessness
- sleep like a log (or top)
- sleep mode
- sleep on it
- sleep (or rest) easy
- sleep out
- sleep over
- sleepover
- sleep rough
- sleep something off
- sleepsuit
- sleep tight
- sleep-train
- sleep training
- sleepwalk
- sleepwalker
- sleepwear