1.
physiology; bodily function
The workings of a living body, and the study of them.
COMMON COLLOCATIONS (sense 1, physiology):
- 生理現象: bodily function, physiological phenomenon
- 生理学: physiology (the science)
- 生理的に無理: physically unbearable; casually, "I just can't stand (him/it)"
COMMON COLLOCATIONS (sense 2, period):
- 生理痛: period pain, menstrual cramps
- 生理用品: sanitary products
- 生理休暇: menstrual leave (a legal right in Japan)
- 生理が来る / 生理になる: one's period starts
Usage
In sense 2, 生理 is the ordinary, polite word; the medical term is 月経.