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单词 phonic wheel
释义

Definition of phonic wheel in English:

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.

Definition of phonic wheel in US English:

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.
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更新时间：2025/4/22 5:04:13