月

1. Celestial Body: The moon; by extension, nighttime or the nocturnal realm.

2. Temporal Unit: The month (based on the lunar cycle).

3. Biological Cycles: Monthly biological rhythms, such as menstruation.

• Noun: Functions as subject or object.
• Classifier/Measure Word: Used following a numeral to indicate duration in months.
• Temporal Marker: Functions adverbially to specify the time of an action.

To resolve ambiguity between celestial and anatomical senses, check for neighboring terms:

• Astronomical/Calendar Context: 日 (sun), 星 (star), 辰 (time/celestial stem), 年 (year), 朔 (new moon), 望 (full moon).
• Anatomical Context: Terms for internal organs, skin, or physical musculature.

Visually identical to 肉 (meat/flesh) in many scripts from the Han period onward. When appearing as a radical in compounds relating to anatomy or the physical body, it functions as the "meat" radical (肉月旁).

If the semantic environment is biological or anatomical, treat the glyph as 肉 rather than 月.