Definition

Noun: - A month measured by the moon's cycles: A lunar month is the time it takes for the moon to complete one full cycle of its phases, such as from one new moon to the next. This period is approximately 29.5 days.

Usage

• is used to describe a unit of time based on the moon's orbit, distinct from calendar months.
• It is often used in astronomical, religious, and cultural contexts (e.g., for calculating festivals).
• Example: "The Islamic calendar is based on the ."

Examples

• General Use:
  • A full lunar month is slightly shorter than most calendar months.
  • Many ancient cultures measured time using the lunar month.
• Specific Context:
  • The Chinese New Year falls on the first day of a new lunar month.
  • The period from one full moon to the next is roughly a lunar month.

Advanced Usage

• "Synodic month": This is a technical term synonymous with , referring specifically to the cycle of lunar phases.
• In Calculations: The exact length of a is about 29 days, 12 hours, 44 minutes, and 3 seconds.

Variants and Related Words

• Moon: The celestial body whose cycles define this period.
• Lunar cycle: The recurring series of the moon's phases.
• Lunation: Another term for a or lunar cycle.

Synonyms

• Synodic month: (Technical) The period between successive new moons.
• Lunation: A complete lunar phase cycle.

Related Phrases

• Lunar calendar: A calendar based on the cycles of the moon.
• Lunar phase: A specific shape of the illuminated part of the moon as seen from Earth (e.g., new moon, full moon).

Noun

1. the period between successive new moons (29.531 days)