royal pendulum
Clockmaking (now chiefly historical )
noun
A pendulum having a period of one second, given by a length of 39.14 in (99.42 cm).
- Such pendulums were used from the late 1660s in English long-case clocks, much improving the timekeeping over earlier, shorter pendulums..
Origin
Late 17th century.
- serialization
- serialize
- serial killer
- serial killing
- serially
- serial marriage
- serial monogamist
- serial monogamy
- serial murderer
- serial number
- serial port
- serial position
- serial rapist
- serial reproduction
- serial rights
- serial section
- serial sectioning
- serial temperatures
- Serian
- seriate
- seriately
- seriatim
- seriation
- Seric
- sericeous