Definition

Noun: - A unit of frequency equal to one billion (10⁹) cycles per second: This is the primary meaning of "gigacycle," referring to a measurement of very high frequency, particularly in electronics, radio, and physics. It is synonymous with the modern unit "gigahertz" (GHz).

Usage Examples

• Noun:
  • The new processor operates at a speed of several gigacycles. (This describes the clock frequency of a computer chip.)
  • Early radio astronomers detected signals with frequencies measured in gigacycles. (This uses the term in a scientific context to describe electromagnetic wave frequency.)

Advanced Usage

• While "gigacycle" is technically correct, it is now an older or less common term. In modern scientific and technical English, "gigahertz" (GHz) is the standard and preferred unit.
  • The satellite transmits data on a 12-gigahertz band. (This is the modern equivalent expression.)

Variants and Related Words

• Gigahertz (GHz) (n): The modern SI unit for frequency, exactly equivalent to one gigacycle per second.
  • The Wi-Fi router uses both 2.4 GHz and 5 GHz frequencies.
• Megacycle (n): An older term for one million cycles per second, now called a megahertz (MHz).
• Kilocycle (n): An older term for one thousand cycles per second, now called a kilohertz (kHz).

Synonyms

• Gigahertz (GHz): The standard modern synonym.
• 10⁹ cycles per second: A descriptive synonym stating the numerical value.

Notes on Meaning

• The word "gigacycle" is a compound of the prefix "giga-" (meaning one billion) and "cycle" (referring to a complete sequence of a wave). It refers explicitly to a count of cycles, not to a unit of time. Therefore, "per second" is a required part of its definition to convey frequency.

Noun

1. 1,000,000,000 periods per second