phonic wheel
noun
A toothed disc or rotor of magnetic material which is caused to rotate at a constant speed by an electromagnet energized by alternating or interrupted direct current (originally derived from a tuning fork vibrating against a contact and sustained by another electromagnet).
Origin
Late 19th century; earliest use found in Telegraphic Journal. After French roue phonique.
- banket
- bank fence
- bank fish
- bank fisherman
- bank fishery
- bank fishing
- Bank for International Settlements
- bankfull
- Bankhead, Tallulah
- bank-high
- bank holiday
- bank-holidayish
- bank holiday weekend
- bank hook
- Ban Ki-moon
- banking
- banking account
- banking engine
- banking ground
- banking house
- bankless
- bank machine
- bankman
- bank manager
- bank martin